A 10 N block is at the bottom of a frictionless incline as shown to the right. How much work must be done against gravity to move it to the top of the incline?
600j
1000j
4800j
800j
Answers
Explanation:
We have,
According to attached figure, the height of the inclined plane is 60 m and force acting on the block is 10 N. It is required to find the work must be done against gravity to move it to the top of the incline. The work done is given by :
W = mgh
or
[tex]W=F\times h\\\\W=10\times 60\\\\W=600\ J[/tex]
Hence, the correct option is (A) "600 J".
Related Questions
Can someone help??
The maximum acceleration of a fist in a karate punch is 4200 m/s2. The mass of the
fist is 0.60 kg. If the fist hits a wooden block, what force does the wood place on the
fist?
Answers
Answer:
F = 2520 N
Explanation:
We have,
The maximum acceleration of a fist in a karate punch is 4200 m/s². The mass of the fist is 0.6 kg.
It is required to find the force that the wood place on the fist. Force is given by the product of mass and its acceleration such that,
F = ma
[tex]F=0.6\times 4200\\\\F=2520\ N[/tex]
So, the force of 2520 N is acting on the wood.
charges can be separated in an isolated system
Answers
Hope this answer is helpful!!!
Mark me as brain lists
A student is pushing a box across the room. To push the box three times farther, the student needs to do how much work?
Answers
Answer:
Removing some of the books reduced the mass of the box, and less force was needed to push it across the floor.
Which of the following is a difference between a law and a theory? A law can become a theory but a theory can never become a law. A theory is based on personal feelings but a law is based on testable evidence. A theory can predict the occurrence of a natural event with certainty but a law cannot. A law is usually a mathematical statement but a theory is a proposed statement.
Answers
Answer:
a theory is based on personal feelings but a law is based on testable evidence because a law is universal and constant fact of nature it is also an irrefutable theory a theory can become a law but a law can never become a theory it is based several scientific experimenrs
Explanation:
i hope this will help you
How may the desire for a perfect lawn related to environmental pollution
Answers
Answer:
Lawns are extremely costly in many ways, including dollars spent on them, the deadly ... Using lawn equipment also significantly adds to noise pollution. ... to all of the environmental damages, including water pollution, caused by fracking. ... ONE's ambition is to remain unbiased and to provide a good
Explanation:
Answer:
The gases from the lawn mower to mow the grass, weed killer toxicity affects, too much of the seeds to help grow your grass can actually harm your grass, etc.
Explanation:
The strong nuclear force is ?
Answers
Answer: Option B
Explanation:
The nuclear force is the strongest force in the universe. It is much more stronger than all the other forces and is 100 times stronger than the electric force.
The nuclear forces can be defined as the forces generated due to electron and protons in which the electrons have negative charge on it and the protons have positive charge on it.
Due to this force all the atoms and molecules, elements and compounds are held together.
Can someone help me??
A car travels 1026 km in 6 hours. Find its average speed.
Answers
Answer:
171
Explanation:
To work out average speed, you have to do distance divide by time.
1026 divide by 6= 171
I hope that helped you.
A person is pulled to the right on a sled (total mass of 52.9 kg) across the surface of a frozen pond with a force of 67.7 Newtons so that they move with a constant velocity. What is the force of friction acting on the sled?
Answers
Answer:
67.7 N
Explanation:
Draw a free body diagram of the person on the sled. There are four forces:
67.7 N to the right,
friction force to the left,
weight force down,
and normal force up.
Constant velocity means 0 acceleration.
Sum of the forces in the x direction:
∑F = ma
67.7 N − F = 0
F = 67.7 N
give one reason why the energy carries bu sound waves decreases as those sound waves travel through air
Answers
What happens when tectonic plates move away from each other? Molten matter cools and sinks towards the core. Lava travels away from the crust and forms the mantle. Molten matter seeps through the crust and forms new land. Lava seeps into the ground through the cracks in the ground.
Answers
A ball held 2.0 meters above the floor has 59 joules of potential energy the bald mass is about
Answers
Answer:
Mass of ball = 3.0102 Kg.
Explanation:
Potential energy at height h is given by
PE = mgh
where m is the mass of the body
g is the the acceleration due to gravity whose value is 9.8 m/s^2
h is the height from surface level
PE is potential energy
In the problem given h = 2 meters
PE = 59 joules
59 = m*9.8*2
=> m = 59/9.8*2 = 3.0102 Kg
Thus, mass of ball is 3.0102 Kg.
Answer:
3
Explanation:
Top person is wrong
just did lesson
Calculating the Volume of a Cone
Try it
Calculate the volume of the cone.
What is the volume of a cone with a height of 27 cm
and a radius of 13 cm? Round your answer to the
nearest tenth.
VE
cm)
27 cm
113 cm
Answers
Answer:
4778.4 cm³
Explanation:
To calculate the density of an object, which of the following values do you
need to know?
A. Volume
B. Buoyancy
C. Weight
D. Mass
Answers
Answer:
Volume I think
Explanation:
Answer:
A. volume and D. mass
Explanation:
Density is the amount of matter (mass) in a given space (volume).
The density of an object can be found using the following formula:
d=m/v
where m is the mass and v is the volume.
In order to find the density, you must know the mass and the volume of the object.
Therefore, the correct answers are A. volume and D. mass.
List the 2 advantages and 2 disadvantages of wind as a source of electricity.
Answers
Answer:
The first 2 advantages of wind a source of electricity is that it provides you wifi and wind. 2 disadvantages of wind as a source of electricity is that to much wind could knock it down or slow down the source of the electricity.
Explanation:
I know this because i read a article on it.
Light rays travel along _____ paths. A. curved B. straight C. changing D. unpredictable
Answers
Answer: Straight :)
Explanation:
LIght rays travel in straight paths and it is impossible for them to travel in curved, unpredictable, and changing paths
2. How far does a car travel in 90 seconds if it is traveling at a speed of 55 m/s?
Answers
Answer:
distance = speed × time
= 55m/s × 90s
= 4950 m
if san andreas fault slips 2.5 cm each year how far would it separate in 100 years
Answers
Answer:
250cm or 2.5m
Explanation:
using direct variation
the length is = l
the time (year) = t
let k be the constant
so he have:
l=kt
2.5=k× 1
k= 2.5
Now in the next statement the 100 is given but not the length so
l=kt
~ l=k× 100 years
But k = 2.5
so :
l= 2.5×100
l= 250 cm
Hence it will be 250cm or 2.5m at which they will get separated
Circuit questions. Plz help. Only answer is ok
Answers
**I’m not so sure about (c) part (i), but I’m pretty confident everything else is correct.**
How do Newton's laws of motion explain why it is important to keep the ice smooth on a hockey rink so that players can
pass a puck as quickly as possible?
OSmooth ice reduces the inertia of the hockey puck.
Smooth ice increases the force used to accelerate the hockey puck.
Smooth ice reduces the unbalanced forces that would slow the hockey puck.
Smooth ice decreases the reaction force that the ice exerts on the hockey puck.
Save and Fxit
Answers
Answer:
c
Explanation:
edge 2021
what is the numerical value in meters per second squared of the acceleration of an object experiencing true free fall
Answers
Answer:
9.8m/s²
Explanation:
An object experiening a free fall is simply under the influence of gravity.
When an object is influenced by gravity, the object falls with an acceleration known as acceleration due to gravity.
This acceleration known as acceleration due to gravity has a constant value of 9.8m/s².
Which converts mechanical energy to electrical energy?
A. A flashlight
B. An electric motor
C. A generator
D. An electromagnet
Answers
Answer:
c. A Generator
Explanation:
The whole point of a generator is to produce electrical energy. The generator will use a mechanical motor usually running off of gas to produce electricity.
if earth were not tilted, would we still have seasons?
Answers
Answer:
Glad you asked that!
Explanation:
Actually,no.You see,if the earth was perfectly straight,then the northern hemisphere and southern hemisphere would have the same seasons,which is pretty much the world.But our world is tilted,so we happen to have differences for southern hemisphere and northern hemisphere.
Which of the following is an example of a device that uses a wheel and axle?
Check all that apply
A. frisbee
B. light bulb
C. doorknob
D. bicycle
(multiple answers)
Answers
The single invention of the ______ has advanced what we know about the universe more than any other scientific technology. a. Sundial b. Calculator c. Telescope d. Calculator
Answers
Answer: C
Telescope
Explanation: A telescope is an optical device in which scientists ( astronomers) use to view far away distance objects in the universe.
The single invention of the telescope has advanced what we know about the universe more than any other scientific technology. Because with the use of telescope alone, astronomers could view and study many heavenly objects or bodies and many planets in the universe.
The optical instrument makes very far distant objects appear magnified by using an arrangement of lenses or curved mirrors and lenses for clearer viewing of heavenly objects and planets in our universe.
Spaceship 1 and Spaceship 2 have equal masses of 300kg. They collide. Spaceship 1's final speed is 3 m/s, and Spaceship 2's final speed is 2 m/s in the same direction. What is their combined momentum? A. 600 kg-m/s B. 1,500 kg-m/s C. 1,200 kg-m/s D. 900 kg-m/s
Answers
Answer:
B. 1500 kg*m/s
Explanation:
Momentum p = m* v
In any type of collision, the total momentum is preserved!
The total momentum before and the total momentum after the collision is the same. We know the mass and speed after the collision so we can calculate the total momentum.
p1 + p2 =
m1*v1 + m2*v2
m1 = me = 300 kg
v1 = 3 m/s
v2 = 2 m/s
Substitute the given numbers:
300*3 + 300+2
900 + 600
1500 kg*m/s, which is answer B.
Land masses that move on Earth are called: a. Continents b. Tectonic continents c. Tectonic plates d. Rock Masses HELP
Answers
Answer:
c. tectonic plates
Explanation:
Answer:
the answer is rock masses
Which is a resource that the National Park Service manages?
A. memorials
B. wildlife refuges
C. ecosystems
D. endangered species
Answers
Answer:
Which is a resource that the National Park Service manages?
A. memorials
B. wildlife refuges
Answer:
wildlife refuges
Explanation: