Force & Motion CBA Review

Which of the following DOES NOT represent a change in velocity?

• A person riding a motorcycle at 30 mi/hwest and decreasing speed to 25 mi/h west.

• A balloon is floating up into the air at 3 m/s. It then pops and starts falling to the ground.

• A train is traveling south at 120 km/h.

• A person is jogging east at 6 mi/h and then turns north.

What is the definition of weight?

• A gravitational force on a mass.

• How big an object is.

• The amount of matter in an object.

• The amount of space an object takes up.

The diagram shows what happens to the passenger on a train after it comes to a stop. What direction would the passenger move if the train were to move forward at a fast speed?

• backward

• sideways

• forward

• no motion

A student slides a book across a desk by giving it an initial push. Which of the following is the MOST important reason that the book eventually comes to a stop instead of continuing to slide?

• The initial force was too weak to keep the book in motion.

• The mass of the book was not enough to keep the book in motion.

• The force that occurs when the book rubs against the desk stops the book.

• The magnetic force from the Earth stops the book.

What was the average speed of the bus during the first 5 hours it was moving?

• 200 km/h

• 150 km/h

• 50 km/h

• 40 km/h

Which force would cause the box to move to the right?

• 0 N

• 13 N

• 17 N

• 23 N

Which graph best illustrates something moving at a constant speed?

• Graph 1

• Graph 2

• Graph 3

• Graph 4

A girl is pushing a cart with a force of 6N. Her sister is also pushing on the same cart, in the same direction, with a force of 4N. What is the net force acting on the cart?

• 2N

• 4N

• 6N

• 10N

The car is parked facing west. A second car traveling at a high velocity from the north strikes the car. The force of the second car striking the first will -

• have no effect on the parked car.

• cause the parked car to move toward the north.

• cause the parked car to move toward the south.

• cause the moving car to continue traveling south, but at a higher speed.

How are speed and velocity different?

• Speed includes direction.

• Speed indicates momentum.

• Velocity includes momemtum.

• Velocity includes direction.