Blog

A racquetball is dropped from a height of one meter. It bounces off the floor and rises to a height of 0.8 m. The collision with the floor was

A father and his young daughter are on very clean ice, so there is very little friction (the father has more mass than the daughter). The father pushes his daughter forward and she slides away at a speed of 3 m/s. The father’s velocity is

If you drop a ball in the absence of air resistance, it accelerates downward at approximately 10 m/s2. If instead you throw the ball upward, then its downward acceleration after release is approximately

NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part.Refer to the graph of distance versus time. The velocity of this object at the start of the motion is

A bullet is fired straight down from a hovering helicopter. If we neglect air friction, then the speed of the bullet

A ball is thrown across the street. During its flight, the ball’s speed is lowest at

A ball at the end of a string is swinging as a simple pendulum. Assuming no loss in energy due to friction, we can say for the ball that

NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part.Refer to the graph of distance versus time. For the entire motion, the average velocity is

A ball is thrown straight up. It reaches its highest point and then falls back. Which of the following is the correct statement?

Two velocity vectors are added: one of magnitude 2.0 m/s and one of magnitude 5.0 m/s. Not knowing the respective directions, we can say that the magnitude of the sum of the vectors will be