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- 69. A golf ball rolls off a horizontal cliff with an initial speed of 11.4 m/s. The ball falls a vertical distance of 15.5 m into a lake below. (a) How much time does the ball spend in the air? (b) What is the speed v of the ball just before it strikes the water?A ball is thrown downward from the top of a 40.0 m tower with an initial speed of 12.0 m/s. Assuming negligible air resistance, what is the speed of the ball just before hitting the ground? (See Section 2.6.)1. A ship steams at a constant velocity of 15 m/s . (a) How far does it travel in a day? (b) How long does it take to travel 500 m? 2. Car moves at 50 m/s for 30s and then at 60 m/s for 2 h. (a) How far did it go? (b) What was its average velocity for the entire trip ?
- 17. A ball is thrown downward from the top of a building with an initial speed of 8.9 m/s. If the ball hits the ground after 2.0 s. How tall is the building, assuming negligible air resistance? Write the value of the answer in meters using three significant figures.3. A ball is thrown vertically upward with a speed of 25.0 m/s. (a) How high does it rise? (b) How long does it take to reach its highest point?. An object falls from the top of a 20 storey building 60 m high. How long will it take to reach the ground and with what velocity will it strike the ground? Draw the figure.
- 9. A cyclist approaches the bottom of a gradual hill at a speed of 11 m/s. The hill is 3 m high and the cyclist estimates that she is going fast enough to coast up and over it without pedaling. Ignoring air resistance and friction, find the speed at which the cyclist crests the hill. Answer: .......If a 1.3 kg ball is dropped from the top of a 33.7 meter tall building, what is the maximum velocity of the ball just before it hits the ground?A ball is thrown vertically downward with an initial velocity of 5 meters per second from the top of a building 100 meters above the ground. What is the speed of the ball when it is 10 meters above the ground?
- A man stands on the top of a 725 m building and drops a coin from the top of the building. How fast is the coin moving when it hits the ground? Use two different physics principles.A cat chases a mouse across a 1.7 m high table. The mouse steps out of the way, and the cat slides off the table and strikes the floor 1.5 m from the edge of the table. The acceleration of gravity is 9.81 m/s 2 . What was the cat’s speed when it slid off the table? Answer in units of m/s.A ball rolls off a 1.8 m high table with an initial speed 3.5. When it hits the ground, how far away (horizontally) has it traveled? Answer in meters.