A boy drops a ball from an observation tower. The ball hits the ground in 5.0 s. What is the ball's velocity at the time of impact?

A. 0 m/s

B. 98 m/s

C. 49 m/s

D. 123 m/s

How would life on earth be different if earth's axis were not tilted with respect to its orbit? A. There would be no seasons. B. There would be no day and night. C. All places would have the same climate. D. The seasons would be much shorter.

Explain why it is important to use both qualitative data and quantitative data.

What is the average cost for a severe injury in a collision? A. $4,000 B. $15,000 C. $47,000 D. $247,000

What is the strength of the electric field ep 9.0 mm from a proton?

You should only start the vehicle after you ___ A. Put your foot on the brake. B. Put the vehicle in drive. C. Perform interior and exterior checks. D. Both A and C

What type of friction acts when the books are at rest but a force is exerted?

What is 0.002 represented by

As the amount of charge on two objects increases, the strength of the electrical force between the objects

Which of the two resistors dissipates the larger amount of power?

Three students derive the following equations in which x refers to distance traveled, v the speed, a the acceleration (m/s^2), and t the time, and the subscript (0) means a quantity at time t=0: a) x=vt^2 + 2at, b) x=v0t+1/2at^2, and c) x=v0t+2at^2.