A roller coaster car at rest at the top of a hill, reaches the bottom. What happens to the car's energy?

Potential energy decreases, kinetic energy increases

Why do airbags in cars help protect passengers during crashes?

They increase the time over which the passenger's momentum changes

Which scenario represents negative acceleration?

A ball thrown upward while moving toward its peak

What happens when a feather and a hammer are dropped simultaneously on the Moon?

They hit the ground at the same time

Which has more momentum: a large truck or a small car traveling at the same speed?

The truck, because it has more mass

According to Newton's Third Law, what does the table do in response?

The table pushes up on the book with the same force

Which statement is true about the forces acting on a parachutist falling at constant (terminal) velocity?

The upward and downward forces are equal

Why do you feel heavier than normal when an elevator suddenly starts moving upward?

The elevator floor pushes up on you with extra force

Two identical boxes, Box A is pushed with twice the force as Box B. Compared to Box B, Box A will have

Lifting a light box from the floor to a high shelf

Why does a hockey puck sliding on ice gradually slow down and stop?

Friction between the puck and ice opposes the motion

At the highest point of its flight, which statement is correct?

Velocity is zero, but acceleration is 9.8 m/s² downward

At which point is a pendulum's kinetic energy greatest?

At the lowest point of its swing

At what point does a ball thrown upward have the most potential energy?

At the highest point of its path

Which situation demonstrates Newton's First Law (inertia)?

Passengers leaning forward when a bus stops suddenly

How does Car A's kinetic energy compare to Car B's if Car A is going twice as fast as Car B?

Car A has four times as much kinetic energy

How much work does the student do on the backpack while walking horizontally across campus at constant speed?

Zero work because the motion is horizontal

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Physics Review

21 termsStudBud Administration18 plays

Test your knowledge on basic principles of physics with questions related to Newton's laws, energy, momentum, and more.

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Questions 21

Answers

1
A roller coaster car at rest at the top of a hill, reaches the bottom. What happens to the car's energy?
Both potential and kinetic energy decrease
Both potential and kinetic energy increase
Potential energy decreases, kinetic energy increases
Potential energy increases, kinetic energy decreases
2
A cyclist starts from rest and accelerates at 2.5 m/s² for 8 seconds. What is the cyclist's final velocity?
15 m/s
25 m/s
20 m/s
32 m/s
3
Why do airbags in cars help protect passengers during crashes?
They reduce the passenger's momentum
They increase the time over which the passenger's momentum changes
They eliminate the forces acting on the passenger
They increase the passenger's acceleration
4
Which scenario represents negative acceleration?
A car speeding up as it enters a highway
A ball thrown upward while moving toward its peak
A rocket launching from Earth
A bicycle moving at constant speed on flat ground
5
What happens when a feather and a hammer are dropped simultaneously on the Moon?
The hammer hits the ground first because it's heavier
They hit the ground at the same time
The feather hits the ground first because it's lighter
They float in the air indefinitely
6
Which has more momentum: a large truck or a small car traveling at the same speed?
They have the same momentum
The car, because it's more maneuverable
It depends on their acceleration
The truck, because it has more mass
7
According to Newton's Third Law, what does the table do in response?
The table pushes up on the book with a smaller force
The table doesn't exert any force on the book
The table pushes up on the book with a larger force
The table pushes up on the book with the same force
8
Which statement is true about the forces acting on a parachutist falling at constant (terminal) velocity?
There are no forces acting on the parachutist
The downward force is greater than the upward force
The upward force is greater than the downward force
The upward and downward forces are equal
9
A shopping cart with a mass of 15 kg is pushed with a net force of 45 N. What is the cart's acceleration?
2 m/s²
5 m/s²
60 m/s²
3 m/s²
10
A student lifts a 2.55 kg textbook from the floor to a shelf 1.8 meters high. How much energy does the student have?
1.8 J
13.9 J
25 J
45 J
11
Why do you feel heavier than normal when an elevator suddenly starts moving upward?
Gravity has increased
Your mass has increased
You're moving faster than usual
The elevator floor pushes up on you with extra force
12
In a collision between two objects where they stick together afterward, which statement is true?
Both momentum and kinetic energy are conserved
Neither momentum nor kinetic energy is conserved
Only momentum is conserved
Only kinetic energy is conserved
13
Two identical boxes, Box A is pushed with twice the force as Box B. Compared to Box B, Box A will have
Carrying a box horizontally across a room
Lifting a light box from the floor to a high shelf
Holding a heavy box stationary above your head for 10 minutes
Pushing hard against a wall that doesn't move
14
Why does a hockey puck sliding on ice gradually slow down and stop?
The puck naturally wants to stop moving
The puck runs out of energy
Friction between the puck and ice opposes the motion
Newton's First Law doesn't apply to hockey pucks
15
At the highest point of its flight, which statement is correct?
Velocity is maximum, acceleration is zero
Both velocity and acceleration are zero
Velocity is zero, but acceleration is 9.8 m/s² downward
Both velocity and acceleration are at maximum
16
At which point is a pendulum's kinetic energy greatest?
Halfway between the highest and lowest points
At the highest points of its swing
At the lowest point of its swing
The kinetic energy is constant throughout the swing
17
At what point does a ball thrown upward have the most potential energy?
At the highest point of its path
When it leaves your hand
Halfway up its path
When it returns to your hand
18
A 0.5 kg baseball is thrown with a velocity of 30 m/s. What is the baseball's momentum?
15 kg⋅m/s
60 kg⋅m/s
0.017 kg⋅m/s
30 kg⋅m/s
19
Which situation demonstrates Newton's First Law (inertia)?
A ball accelerating when kicked
A rocket pushing gases downward to move upward
A heavier object falling faster than a lighter one
Passengers leaning forward when a bus stops suddenly
20
How does Car A's kinetic energy compare to Car B's if Car A is going twice as fast as Car B?
Car A has twice as much kinetic energy
Car A has four times as much kinetic energy
Car A has half as much kinetic energy
Both cars have the same kinetic energy
21
How much work does the student do on the backpack while walking horizontally across campus at constant speed?
Zero work because the motion is horizontal
A small amount of work because they're walking slowly
Negative work because they're fighting gravity
A large amount of work because the backpack is heavy

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