Duplicate of Momentum and 3rd law review

Question 1

What would have to be done in order to have a cart continue with constant acceleration?

Accepted Answer

Push the cart continuously

Question 2

A large truck sits on frictionless ice. A fly smashes into the front window. What happens?

Accepted Answer

Truck moves backward

Question 3

Compare size and momentum of both skaters at Time 2.

Accepted Answer

Equal in size but opposite in direction

Question 4

What is the momentum of each skater at time one?

Accepted Answer

0 kg x m/s

Question 5

Define Momentum

Accepted Answer

the quantity of motion of a moving body

Question 6

A book is lying at rest on a table. The book will remain there at rest because:

Accepted Answer

There is no net force on the book.

Question 7

A hockey puck slides on ice at constant velocity. What is the net force acting on the puck?

Accepted Answer

Zero

Question 8

Which object has more momentum and why?

Accepted Answer

the truck because it has greater mass

Question 9

Can an object be at a constant velocity when only one force acts on it?

Accepted Answer

No

Question 10

What is transferred to the truck from the fly?

Accepted Answer

momentum

Question 11

In the previous two questions, who lost momentum and who gained momentum?

Accepted Answer

Granny Lost, Kid gained

Question 12

An object in motion stays in motion and an object at rest stays at rest unless a net force is applied to it

Accepted Answer

Newton's 1st Law

Question 13

What is true about a puck that slides without friction across the ice during a hockey game?

Accepted Answer

The puck moves at constant speed.

Question 14

In terms of momentum, why does the cannon move backwards

Accepted Answer

They start with 0, so the cannon needs to move back to cancel out the ball

Question 15

If a cart has a mass of 10 Kg and momentum of 40 kg m/s, it's velocity would be?

Accepted Answer

4 m/s

Question 16

A moving car has momentum, if it moves twice as fast its momentum is _______ as fast

Accepted Answer

twice

Question 17

When a cannon is fired, in terms of forces, why does the cannon move backwards?

Accepted Answer

There is an equal but opposite force pushing both the cannon and ball

Question 18

What would provide the equal but opposite force in the following scenario?.....bat hits ball

Accepted Answer

ball hits bat

Question 19

A granny on ice skates is moving, she then picks up her motionless grandson without braking. What happens to his speed?

Accepted Answer

increases

Question 20

The granny weighs 80kg and moves at 3 m/s, what is her momentum?

Accepted Answer

240 kgm/s

Question 21

What are the units of momentum?

Accepted Answer

kg⋅m/s

Question 22

A man pushes a sled across a frictionless surface. What must be true?

Accepted Answer

The sled is accelerating to the left.

Question 23

A small car collides with a large truck. Which experiences the greater impact force?

Accepted Answer

Both the same

Question 24

For every action there is an equal and opposite reaction.

Accepted Answer

Newton's 3rd Law

Question 25

What is an object's natural tendency to resist change in motion called?

Accepted Answer

inertia

Question 26

A granny on ice skates is moving, she then picks up her motionless grandson without braking. What happens to her speed?

Accepted Answer

decreases

Question 27

Calculate the momentum of a 1,500kg car going 50 m/s

Accepted Answer

75,000 kg m/s

Question 28

What does Momentum equal

Accepted Answer

Momentum= Mass x Velocity

Question 29

If mass is 40 kg, velocity is 3 m/s. What is the Momentum?

Accepted Answer

120 kg. m/s

Duplicate of Momentum and 3rd law review

Questions 29

Duplicate of Momentum and 3rd law review

Questions 29