Question

Can you answer 3 and 4 and any other question you think would be useful to know?? Thank you!

Free Fall Practice PHYS& 114 Name: 1. An object is dropped from rest for 4.00 s. How far does it fall? 2. A penny is dropped from rest from a height of 3.50 m. a) What is the speed of the penny right before it hits the ground? b) How long does it take the penny to hit the ground? 3. A person throws a set of keys from a height of 4.50 m to a friend waiting below. The keys take 0.580 s to reach the person below. a) What is the initial velocity of the keys? b) What is the final velocity of the keys? 4. A ball is tossed straight up into the air with an initial speed of 4.20 m/s. a) What is the speed of the ball when it reaches its maximum height? b) How long does it take the ball to reach maximum height? c) What is the maximum height the ball will reach? d) What is the height of the ball after 0.300 s? e) What is the velocity of the ball when it returns to the height from which it was thrown? f) How long will it take the ball to return to the height from which it was thrown? 5. A hacky sack is kicked into the air. If it takes the hacky sack 2.15 s to return to the same height it was kicked, what is the initial velocity of the hacky sack? 6. A unique type of basketball is played on the planet Zarth. During the game, a player flies above the basket and drops the ball in from a height of 10.0 m. If the ball takes 5.00 s to fall, find the acceleration due to gravity on Zarth. 7. A ball is thrown straight downward from a height of 1.50 m with a speed of 9.44 m/s. a) What is the velocity of the ball just before it hits the ground? b) How long does it take the ball to reach the ground? 8. Mt. Everest is more than 8000 m high. How fast (in mi/h) would an object be moving if it could free fall to sea level after being released from the top of Mt. Everest (ignoring the effects of air resistance)?

Answer 1