Quiz about Kinetic Energy and Momentum

Question 1

energy of motion

Accepted Answer

kinetic energy

Answer

potential energy

Answer

movement

Answer

work

Question 2

the quantity or strength of an object's motion; mass x velocity

Accepted Answer

momentum

Answer

speed

Answer

force

Answer

energy

Question 3

the capacity necessary to do work; controls the amount of change that can occur within a system

Accepted Answer

energy

Answer

speed

Answer

joule

Answer

momentum

Question 4

In an elastic collision, ______ is conserved.

Accepted Answer

Both momentum and energy

Answer

Momentum only

Answer

Kinetic Energy only

Question 5

The equation to calculate momentum is

Accepted Answer

p=mv

Answer

p=1/2mv2

Answer

p=mgh

Answer

p=mg

Question 6

In a perfectly inelastic collision, ______ is conserved.

Accepted Answer

Momentum only

Answer

Kinetic Energy only

Answer

Both momentum and kinetic energy

Question 7

A 50 kg ball rolls down the street at 5 m/s. Calculate the momentum of the ball.

Accepted Answer

250 kg*m/s

Answer

55 kg*m/s

Answer

100 kg*m/s

Answer

500 kg*m/s

Question 8

Two skaters begin at rest. Skater 1 has a smaller mass than Skater 2. After they push off each other,...

Accepted Answer

Skater 1 has a greater speed than Skater 2

Answer

Skater 1 experiences a greater change in momentum

Answer

Skater 2 experiences a greater change in momentum

Answer

Skater 1 experiences a greater force

Question 9

Determine the momentum of 1000-kg car moving northward at 20 m/s.........

Accepted Answer

20000 kg * m/s north

Answer

20000 N

Answer

20000 Joules

Answer

20000 Kg * m/s

Question 10

A runner has a momentum of 720 kg m/s and is traveling at a velocity of 5 m/s. What is his mass?

Accepted Answer

144 kg

Answer

14.4 kg

Answer

1400 kg

Answer

360 kg

Question 11

When the speed of an object is doubled, its momentum

Accepted Answer

doubles

Answer

remains unchanged in accord with the conservation of momentum.

Answer

quadruples

Answer

decreases

Question 12

A 2 kg cart has a momentum of 16 kg m/s. What is its velocity?

Accepted Answer

8 m/s

Answer

32 m/s

Answer

0.125 m/s

Answer

18 m/s

Question 13

In any collision (crash) the ______ is ALWAYS constant

Accepted Answer

Total Momentum

Answer

total speed

Answer

total Velocity

Answer

Energy

Question 14

The total momentum before a collision is _________ the total momentum after a collision.

Accepted Answer

equal to

Answer

less than

Answer

more than

Answer

It depends on the type of collision

Question 15

Which of the following has the least amount of momentum?

Accepted Answer

An ant at rest

Answer

An ant walking along the ground

Answer

An elephant walking

Answer

An elephant running

Question 16

If two objects have the same mass, then the faster moving object has ____________ momentum.

Accepted Answer

more

Answer

less

Answer

the same

Question 17

The energy possessed by an object due to its motion is called

Accepted Answer

Kinetic Energy

Answer

Potential Energy

Answer

Thermal Energy

Answer

Chemical Energy

Question 18

The formula to calculate kinetic energy is

Accepted Answer

$$KE = \frac{1}{2}mv^2$$

Answer

$$KE = mv$$

Answer

$$KE = mgh$$

Answer

$$KE = \frac{1}{2}mv$$

Question 19

Momentum is defined as the product of an object's

Accepted Answer

Mass and velocity

Answer

Mass and acceleration

Answer

Force and distance

Answer

Energy and time

Question 20

If a 5 kg object is moving at 10 m/s, its momentum is

Accepted Answer

50 kg m/s

Answer

5 kg m/s

Answer

500 kg m/s

Answer

0.5 kg m/s

Question 21

When the velocity of an object is doubled, its kinetic energy

Accepted Answer

Quadruples

Answer

Doubles

Answer

Remains the same

Answer

Halves

Question 22

A car and a truck are moving at the same speed. Which has more momentum?

Accepted Answer

The truck

Answer

The car

Answer

Both have the same momentum

Answer

It depends on the direction

Question 23

The unit of momentum in the International System of Units (SI) is

Accepted Answer

kg m/s

Answer

Newton

Answer

Joule

Answer

Watt

Question 24

Which of the following scenarios demonstrates the conservation of momentum?

Accepted Answer

Two ice skaters push off each other and move in opposite directions

Answer

A ball rolling down a hill speeds up

Answer

A car accelerates on a highway

Answer

A book falls off a table

Question 25

In a closed system, the total kinetic energy after a collision is

Accepted Answer

Equal to before the collision

Answer

Less than before the collision

Answer

More than before the collision

Answer

Dependent on the type of collision

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