Kinematics

Which direction is the object traveling between 12 and 16 seconds?

• forward

• backward

Mack was skating to the park. He went 1.5 mi north, west for 0.75 mi, south 3 mi, and east 1.25 mi. What is Mack's total displacement?

• 1.58 mi NW

• 2.5 mi NE

• 1.58 SE

• 1.75 SW

Where is the graph showing a decrease in speed?

• 0-20 seconds

• 20-30 seconds

• 30-40 seconds

• 40-50 seconds

A car traveling at a speed of 20.0 m/s increases its speed to 30.0 m/s in 5.0 seconds. What is the acceleration of the car?

• -2 m/s/s

• 2 m/s/s

• -0.5 m/s/s

• 0.5 m/s/s

An escalator is moving up at 1.0 mi/hr. Jared is walking up the escalator at 2.0 mi/hr. What is Jared's resultant (actual) velocity?

• 1.0 mi/hr down

• 2.0 mi/hr up

• 2.24 mi/hr up

• 3.0 mi/hr up

Sally is on a train moving at 160 km/hr. If she is on the train for 0.65 hours, how far has she travelled?

• 246 km

• 104 km

• 0.0041 km

Calculate the slope between 20 and 30 seconds.

• 0 m/s/s

• -0.5 m/s/s

• 10 m/s/s

Sam jumped from a plane. His acceleration was -9.8m/s/s. He hit the ground in 30 seconds. What was his velocity just before he hit the ground?

• 294 m/s

• 0.32 m/s

• -294 m/s

• 3.1 m/s

What is the velocity between 12 and 16 seconds?

• -10 m/s

• -2.5 m/s

• 2.5 m/s

Which scenario or scenarios demonstrate acceleration? (Mark all that apply)

• A bicycle skidding to a stop

• A runner taking off from a stop.

• A car taking a corner at a constant speed.

• none of these