What is the SI unit of momentum?

Kilogram meter per second (kg·m/s)

Which of the following situations involves negative work?

A box slides on the floor and friction slows it down.

A student pushes a trolley forward.

An elevator moves upward carrying passengers.

Which statement explains why the work done on the load is the same whether or not a pulley is used?

The pulley changes the direction of the applied force but not the total work.

The pulley multiplies the work done by the worker.

The pulley eliminates the force needed to move the load.

The pulley increases the distance but reduces displacement.

Which statement best explains why a moving bicycle eventually stops if you stop pedaling?

Friction and air resistance transform kinetic energy into heat.

The bicycle loses all its energy.

The wheels become too heavy to move.

Energy disappears when motion stops.

Why does a ball at the top of a hill have potential energy?

It has mass and is at a height above the ground.

It has no energy until it moves.

Which statement best explains why wearing padded gloves reduces injury in boxing?

The gloves increase the time of impact, reducing the force.

The gloves increase the force of impact.

The gloves decrease the momentum of the punch.

Why does a fast-moving truck have more momentum than a slow-moving car, even if both have the same mass?

The truck has less acceleration.

Which law states that the total momentum of a closed system remains constant if no external force acts on it?

Law of Conservation of Momentum

A diagram of a person in an elevator shows normal force less than weight. Which judgment is correct?

The diagram is correct if the elevator is accelerating downward.

The diagram is correct if the elevator is accelerating upward.

The diagram is correct if the elevator moves upward at constant speed.

The diagram is wrong because normal force must always equal weight.

A coach suggests that players should bend their knees when landing from a jump to reduce the risk of injury. Which reasoning best supports this advice?

Bending the knees increases the time of impact, reducing the average force.

Bending the knees reduces the player's mass.

Bending the knees decreases the time of impact.

Bending the knees increases the change in momentum.

Two students lift identical boxes to the same height. Student A does it in 3 seconds, and Student B in 6 seconds. Which statement is correct?

Both do the same work, but Student A has greater power output.

Student A does more work because he is faster.

Student B does more work because he works longer.

Both do the same work and have the same power output.

A roller coaster car at the top of a hill has 5000 J of potential energy. At the bottom, it has 4800 J of kinetic energy. Which conclusion is best?

Energy was lost to friction and air resistance.

The car gained extra energy while moving.

Energy disappeared completely during motion.

The law of conservation of energy does not apply here.

Two balls of different masses roll down the same slope without friction. Which statement is correct about their kinetic energy at the bottom?

Both balls will have the same velocity, but the heavier ball will have more kinetic energy.

The heavier ball will have more kinetic energy because of greater mass.

Both balls will have the same kinetic energy because height is the same.

The lighter ball will have more kinetic energy because it accelerates faster.

A worker has to choose between two ramps to move a cart to a platform: Ramp A (short but steep) and Ramp B (long but gentle). Ignoring friction, which choice is better if the worker wants to use less force?

Ramp B, because the slope requires less force for the same work.

Ramp A, because speed is higher.

Either, because both require the same force.

An athlete wants to maximize his power output in a weightlifting competition. Which adjustment is most effective?

Lifting more weight in the same amount of time.

Lifting lighter weights faster.

Lifting the same weight in more time.

Lifting the same weight in the same time repeatedly.

Which would have the LEAST gravitational energy (GPE)?

A rock sitting on top of Mt. Everest.

An airplane flying 30,000 feet above the ground.

General Physics Quiz

Quiz

•

Science

•

9th Grade

•

Practice Problem

•

Easy

Charlotte Mateo

Used 1+ times

FREE Resource

25 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Which of these is NOT a contact force?

Applied force

Magnetic Force

Normal Force

Spring Force

2.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

This is a sketch of an object of interest with all the surrounding objects stripped away and all of the forces acting on the body shown. What is this?

Action

Free-Body Diagram

Interaction

Reaction

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the SI unit of work?

Joule

Newton

Watt

Pascal

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is the unit of energy in the SI system?

Newton

Joule

Watt

Pascal

5.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

What is kinetic energy?

Energy of motion

Energy stored in chemical bonds

Energy from the Sun

Energy stored in an object's position

6.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

What is potential energy?

Energy from heat.

Energy from electricity.

Energy of a moving object.

Energy stored due to position or condition.

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is the CORRECT formula for momentum?

p=ma

p=mv

p=FT

p=mg

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General Physics Quiz

25 questions

Which of these is NOT a contact force?

This is a sketch of an object of interest with all the surrounding objects stripped away and all of the forces acting on the body shown. What is this?

What is the SI unit of work?

Which of the following is the unit of energy in the SI system?

What is kinetic energy?

What is potential energy?

Which of the following is the CORRECT formula for momentum?

What is the SI unit of momentum?

Which physical quantity describes the product of force and the time it acts?

Which of the following situations involves negative work?

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