Calculating Forces Lesson

Multiple Select

An object at rest needs a(n) _______ force in order to move.

• balanced

• unbalanced

Multiple Choice

Balanced or Unbalanced: A cop driving 75 mph South.

• balanced

• unbalanced

Multiple Choice

Balanced or Unbalanced: A cup knocked over on the table.

• balanced

• unbalanced

Multiple Choice

Balanced or Unbalanced: A baseball being hit to center field.

• balanced

• unbalanced

Multiple Choice

Balanced or Unbalanced: An airplane landing at the airport.

• balanced

• unbalanced

Multiple Choice

Balanced or Unbalanced: A frisbee sitting on the ground motionless.

• balanced

• unbalanced

Multiple Choice

You and your friend are moving a couch from one side to another. You push with a force of 20 N to the right and your friend pushes with a force of 25 N to the right.

• 5 N to the right

• 45 N to the left

• 45 N to the right

Multiple Choice

What is the net force?

• 10 N to the right

• 10 N to the left

• 130 N to the left

• 130 N to the right

Multiple Choice

What is the net force?

• 10 N to the left

• 10 N to the right

• 50 N to the right

• 60 N to the left

Multiple Choice

What is the net force?

• 0 N

• 10 N to the left

• 20 N to the right

• 20 N to the left

Multiple Choice

What is the net force?

• 5 N to the left

• 10 N to the left

• 10 N to the right

• 15 N to the left

Multiple Choice

Omar and Katey reach for the same toy car at the same time. Omar pulls the toy away from Katey with a force of 10 N. Katey is pulling back with a force of 6 N. What is the net force?

• 4 N

• 6 N

• 10 N

• 16 N

Multiple Choice

You push a shopping cart with a force of 40 N. The friction caused by the ground is exerting a force of 6 N. What is the net force?

• 34 N to the left

• 46 to the left

• 34 N to the right

• 46 N to the right

Multiple Choice

Give an example of action-reaction force pairs.

• Kicking a ball and the ball kicking back

• Pulling a rope and the rope pulling back

• Lifting a weight and the weight lifting back

• Pushing against a wall and the wall pushing back

Multiple Choice

When a car accelerates forward, what is the equal and opposite reaction?

• The car pushes backward on the ground.

• The car pushes forward on the ground.

• The car pushes downward on the ground.

• The car pulls forward on the ground.

Multiple Choice

What happens to the force exerted by a person on the ground when they jump?

• The force exerted by a person on the ground increases momentarily when they jump.

• The force exerted by a person on the ground is negligible when they jump.

• The force exerted by a person on the ground remains constant when they jump.

• The force exerted by a person on the ground decreases when they jump.

Multiple Choice

When a person pushes a wall, what are the action and reaction forces involved?

• Action and reaction

• Force and reaction

• Action force and reaction force

• Push force and wall force

Multiple Choice

A book rests on a table.  The force of gravity pulls down on the book with a force of 20 newtons. What prevents the books from accelerating downward ?   

• The table presses back up on the book with an equal and opposite force of 20 newtons.

• The table presses back up with a force greater than 20 Newtons

• The tale and the book together are accelerating downwards at 9.8 m/sec2

• The inertia of the book holds it up

Multiple Choice

A player throws a ball. The action force is the player impact on the ball. The reaction force is...

• The force of the ball impact on the player
• The force of the grip of the ball
• The celebration the player is thinking of

Multiple Choice

Newtons law states that for every action, there is an_________ reaction

• unequal and opposite

• stronger and opposite

• equal and similar

• equal and opposite

Multiple Choice

All forces occur in pairs

• true

• false