Physics Middle School

Question 1
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?

A)600j

B)1000j

C)4800j

D)800j

Question 1A 10 N Block Is At The Bottom Of A Frictionless Incline As Shown To The Right. How Much Work

Answers

Answer 1

Answer:

W = 600 J

Explanation:

We have,

According to attached figure,

Height of the inclined plane is 60 m

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]

So, the work done against the gravity is 600 J.

Related Questions

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

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.

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

Molten Mattet Seeps through the crust and forms new land.

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

give one reason why the energy carries bu sound waves decreases as those sound waves travel through air​

Answers

sound waves can only travel in space if there’s enough particles around to transmit the energy in the wave from the source to the listener. Particles in the air are less dense that’s why it decreases.

charges can be separated in an isolated system

Answers

The net charge of an isolated system remains constant. The only way to change the net charge of a system is to bring in charge from elsewhere, or remove charge from the system. Charge can be created and destroyed, but only in positive-negative pairs.

Hope this answer is helpful!!!

Mark me as brain lists

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.

Clean & environment friendly fuel source, Renewable & sustainable the disadvantages are noise and aesthetic pollution, not a profitable fit of land.


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.

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.

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

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:

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