Show:
Newton's First Law
Newton's Second Law Concepts
Newton's 2nd Law Calculations
Newton's Third Law
Miscellaneous
100

What property does inertia depend on?

mass

100

As force applied to a textbook increases, what happens to its acceleration?

Acceleration increases

100

A force of 25 newtons east and a force of 25 newtons west act concurrently on a 5.0-kilogram cart. What is the acceleration of the cart?

0m/s2

100

A student pulls a 60.-newton sled with a force having a magnitude of 20. newtons. What is the magnitude of the force that the sled exerts on the student?

20N

100

The diagram below shows a horizontal 12-newton force being applied to two blocks, A and B, initially at rest on a horizontal, frictionless surface. Block A has a mass of 1.0 kilogram and block B has a mass of 2.0 kilograms.

What is the magnitude of the acceleration of block B?

4m/s2

200

A 15-kilogram cart is at rest on a horizontal surface. A 5-kilogram box is placed in the cart. Compared to the mass and inertia of the cart, the cart-box system has

  1. more mass and more inertia
  2. more mass and the same inertia
  3. the same mass and more inertia
  4. less mass and more inertia

Choice A- more mass and more inertia

200

A 1-newton metal disk resting on an index card that is balanced on top of a glass.What is the net force acting on the disk?

0N (not moving- no accleration- no net force)

200

Sally has a car that accelerates at 5 m/s2 . If the car has a mass of 1000 kg, how much force does the car produce?

5000N

200

A 40.0-kilogram child exerts a 100.-newton force on a 50.0-kilogram object. What is the magnitude of the force that the object exerts on the child?

100N

200

Which situation describes an object that has no unbalanced force acting on it?

  1. an apple in free fall
  2. a satellite orbiting Earth
  3. a hockey puck moving at constant velocity across ice
  4. a laboratory cart moving down a frictionless 30.° incline


Choice C- a hockey puck moving at constant velocity across ice

300

The magnitude of an unbalanced force applied to a 4.0-kilogram crate is 10. newtons. If the magnitude of this applied unbalanced force is doubled, the inertia of the crate is

  1. halved

  2. unchanged

  3. doubled

  4. quadrupled

B unchanged

300

An object weighing 2.0 newtons is pushed across a horizontal, frictionless surface by a horizontal force of 4.0 newtons. What is the magnitude of the net force acting on the object?

4N

300

If a net force of 6 N is applied to an object with a mass of 24 kg, then what will the resulting acceleration be according to Newton's second law of motion?

0.25m/s2

300

A 60.-kilogram man is pushing a 30.-kilogram lawn mower. Compared to the magnitude of the force exerted on the lawn mower by the man, the magnitude of the force exerted on the man by the lawn mower is

  1. one-quarter as great

  2. one-half as great

  3. the same

  4. twice as great

Choice C- the same

300

What are the basic units of force? 

* Newton's is a derived unit

kg-m/s2

400

As shown in the diagram below, an open box and its contents have a combined mass of 5.0 kilograms. A horizontal force of 15 newtons is required to push the box at a constant speed of 1.5 meters per second across a level surface.

The inertia of the box and its contents increases if there is an increase in the

  1. speed of the box
  2. mass of the contents of the box
  3. magnitude of the horizontal force applied to the box
  4. coefficient of kinetic friction between the box and the level surface


Choice B- mass of the contents of the box

400

The diagram below represents two forces, F1 and F2, acting concurrently on a block sliding on a horizontal, frictionless surface.

Describe the motion of the block.

Moving at a constant speed. 

400

A 4.0-kilogram object is accelerated at 3.0 meters per second2 north by an unbalanced force. The same unbalanced force acting on a 2.0-kilogram object will accelerate this object toward the north at what acceleration?

6.0 m/s2

400

A baseball bat exerts a force of magnitude F on a ball. If the mass of the bat is three times the mass of the ball, the magnitude of the force of the ball on the bat is

  1. F
  2. 2F
  3. 3F
  4. F/3

Choice A- F

400

The weight of a typical high school physics student is closest to 

1. 1500 N 

2. 600 N

3. 120 N 

4. 60 N

2. 600 N

500

Which object has the greatest inertia?

  1. a 5.00-kg mass moving at 10.0 m/s
  2. a 10.0-kg mass moving at 1.00 m/s
  3. a 15.0-kg mass moving at 10.0 m/s
  4. a 20.0-kg mass moving at 1.00 m/s

Choice D- a 20.0-kg mass moving at 1.00 m/s

500

A man standing on a scale in an elevator notices that the scale reads 30 newtons greater than his normal weight. Which type of movement of the elevator could cause this greater-than-normal reading?

the elevator is accelerating upward

500

What is the mass of a falling rock if it produces a force of 147 N?

Fnet=ma

147N=m(9.81m/s2)

m=14.98kg

500

Earth’s mass is approximately 81 times the mass of the Moon. If Earth exerts a gravitational force of magnitude F on the Moon, the magnitude of the gravitational force of the Moon on Earth is

  1. F
  3. 9F
  4. 81F

Choice A -F

500

The mass of a high school football player is approximately 

1. 100 kg 

2. 101 kg 

3. 102 kg

4. 103 kg

Remember, Every kg is about 2 pounds

1. 100 kg= 1kg = 2lbs 

2. 101 kg= 10kg = 2 lbs

3. 102 kg= 100kg = 200 lbs --> Answer

4. 103 kg= 1000kg = 2000 lbs