1) Convert a speed of 24.5 m/s to units of km/h. (1 mi= 1.609 km, 1 km = 1000 m)

2) What is the sum of 5.2 + 2.786 + 3.30 written with the correct number of significant figures?

3) What is14.11.0503.2 to the correct number of significant figures?

4) If m is mass and v is velocity, what are the SI units of p? p = mv

5) An 8.0-kg box slides on a frictionless surface with a speed of 15 m/s.

A) What form of energy does this box have? How much energy?

B) The box slides into a spring with a spring constant of 100 N/m, compressing the spring and bringing the box to a stop. What energy transformation took place?

C) By what distance was the spring compressed?

6) A squirrel is running back and forth on a road. He starts at the edge of the road, runs 2.5 meters into the road, then runs back 1.5 meters where he stops. The total time for the squirrel's motion is 5.0 s. Draw the motion diagram in the space below. What is average speed of the squirrel?

7) A ball rolls onto a grassy lawn with an initial speed of 3.0 m/s. The grass slows down the ball to rest in 1.5 seconds.

A) Sketch the velocity and acceleration time graphs (not motion diagram) for the motion of the ball.

B) What is the acceleration of the ball?