1. A high wire artist missteps and falls 9.2m to the ground. What was her speed on impact with the ground?

Givens / Equation (s) / Solution

2. A cat falls out of a tree, dropping 16m to the ground. How long is the cat in the air?

Givens / Equation (s) / Solution

3. You drop a rock from a bridge, and it hits the water 2.3s later. (a) What is the height of the bridge? (b) What is the velocity of the rock when it hits the water?

Givens / Equation (s) / Solution
a
b

4. You throw a baseball straight up, it leaves your hand at 15m/s. (a) How high does the ball rise? (b) How long is the ball in the air?

Givens / Equation (s) / Solution
a
b

5. A brick falls freely from a high scaffold. (a) What is its velocity after 4 seconds. (b) How far does the brick fall during the first 4 seconds?

Givens / Equation (s) / Solution
a
b

6. A tennis ball is thrown straight up with an initial speed of 22.5m/s. (a) How long does the ball remain in the air? (b) How high does it rise?

Givens / Equation (s) / Solution
a
b

7. You drop a golf ball. How far does it fall in 0.5 seconds?

Givens / Equation (s) / Solution

8. A man falls 1.0m to the floor. (a) How long does the fall take? (b) How fast is he going when he hits the floor?

Givens / Equation (s) / Solution
a
b

9. A pitcher throws a baseball straight up with an initial velocity of +27m/s. (if up is +, down is -, so the acceleration of the ball is -9.80 m/s2. (a) How long does it take the ball to rise to reach its highest point? (b) How high does the ball rise?

Givens / Equation (s) / Solution
a
b

10. The jump of a flea can be analyzed by using slow motion photographs. The motion can be separated into two parts. The first is the “push-off” lasting 0.001seconds, during which the fleas legs push against the ground and accelerate it to a speed of 1.0m/s. The second part of the flight of the flea into the air is subject only to gravity.

(a) Calculate the acceleration of the flea during “push-off”.

(b) Calculate the distance above the ground the flea reaches during the push off.

(c) The height the flea reaches during the second phase when its acceleration is that of gravity.

Givens / Equation (s) / Solution
a
b
c