Physics Middle School

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

Spaceship 1 And Spaceship 2 Have Equal Masses Of 300kg. They Collide. Spaceship 1's Final Speed Is 3

Answers

Answer 1

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.

Related Questions


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.

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

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.

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

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

C ; doorknob. got this answer by googling examples of a device that uses a wheel and axle.

How does population density differ from population size?
а. Population size takes all organisms into account while population density only takes specific age
groups of the population into account
b. Population size is the total number of organisms, while population density is the total number of
organisms within a given area
C Population size is the total number of organisms within a given area, while population density is the
total number of organisms of a specific age
d. Population size is the total number of organisms of all species, while population density is the total
number of organisms of a specific species

Answers

Answer: B

Explanation:

Population size focuses on the size of the population. That is, the total number of organisms in a population.

While population density focuses on the density of the population. That is, mean number of organisms per unit area or volume.

Therefore, Population size is the total number of organisms, while population density is the total number of

organisms within a given area

Circuit questions. Plz help. Only answer is ok

Answers

Here are the answers in the picture below:

**I’m not so sure about (c) part (i), but I’m pretty confident everything else is correct.**
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