1/20/2021

The graph above shows the relationship between the speed and elapsed time for an object falling freely from rest near the surface of a planet.

What is the total distance the object falls during the first 3.0 seconds?

• 12 m

• 24 m

• 44 m

• 72 m

The graph above represents the relationship between velocity and time for an object moving along a straight line.

What is the magnitude of the object's acceleration?

• 5.0 m/s²

• 8.0 m/s2

• 10. m/s²

• 20. m/s²

The graph above represents the relationship between velocity and time of travel for a toy car moving in a straight line.

The shaded area under the line represents the toy car's

• displacement

• momentum

• acceleration

• speed

A cart travels with a constant nonzero acceleration along a straight line. Which graph best represents the relationship between the distance the cart travels and time of travel?

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In a race, a runner traveled 12 meters in 4.0 seconds as she accelerated uniformly from rest. The magnitude of the acceleration of the runner was

• 0.25 m/s²

• 1.5 m/s2

• 3.0 m/s²

• 48 m/s²

The diagram below represents a 5.0-newton force and a 12-newton force acting on point P.

The resultant of the two forces has a magnitude of

• 5.0 N

• 7.0 N

• 12 N

• 13 N

A child pulls a wagon at a constant velocity along a level sidewalk. The child does this by applying a 22-newton force to the wagon handle, which is inclined at 35° to the sidewalk as shown below

What is the magnitude of the force of friction on the wagon?

• 11 N

• 13 N

• 18 N

• 22 N

A 100.-newton force acts on point P, as shown in the diagram above.

The magnitude of the vertical component of this force is approximately

• 30. N

• 50. N

• 71 N

• 87 N

According to your reference table, Approximate Coefficents of Friction, what is the minimum horizontal force needed to start a 300. N steel block on a steel table in motion?

• 0.57 N

• 0.74 N

• 171 N

• 222 N

Jim wishes to push a 100. N wood crate across a wood floor.What is the minimum horizontal force that would be required to start the crate moving?

• 30. N

• 42 N

• 72 N

• 100 N