Projectile motion problems MOSTLY TYPE 2-3. Q1 Several firefighters are using a stream of water from a hose to put out the fire in a 3 rd story apartment.

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Presentation transcript:

Projectile motion problems MOSTLY TYPE 2-3

Q1 Several firefighters are using a stream of water from a hose to put out the fire in a 3 rd story apartment. The height reached by the stream of water is 12.5 m. The initial velocity of the water is 40 m/s and it is launched at an angle of 60 degrees from horizontal. A.Complete the chart B.Identify the range value C.Determine the overall velocity (angle to be measured from horizontal)

Q2 A golfer hits the ball with an initial velocity of 50 m/s at an angle of 40 degrees from horizontal. The ball lands on ground which has the same elevation as the tee. A. Complete the chart B. Determine the maximum height of the ball

Q3 A 5 kg demented bunny runs off a dock into the water for a bit of a swim. The height of the dock was 1.9 m higher than the water and the bunny landed about 1.2 m away from the base of the dock. A. Complete the chart B. Convert the initial speed of bunny into miles per hour. How realistic is the speed? (1 km = 0.6 miles, 3.6 km/hr = 1 m/s)

Q4 A 75 kg person is riding a 20 kg sled as it moves down a hill (angled 25 degrees from horizontal). The sled’s acceleration is 2.9 m/s, with an initial velocity of 1.5 m/s and the length hill 100 m. At the end of the 100 m, there is a 200 m cliff. A) What is the final velocity of the sled as it slides off the cliff? B) What is the coefficient of friction between sled and hill? C) Complete projectile chart for sled as it falls over the cliff

Q5 A catapult launches a pumpkin at 45° with a velocity of m/s from on the observation deck of the empire state building. The height of the building is km. a.Find out how long the pumpkin is in the air? b.What is the range of the pumpkin? c.Why are the answers in a and b not correct, even if how you calculated them was right?

Q6 Oscar is really bored, so he decides to launch his sister’s Bob Marley CD off the roof of his 15 m tall home. The CD initially moves at 247 m/s at a 28° angle from horizontal. Find all unknown values in the chart, including all unknowns in the vertical max column.

Q7 A phone vibrates itself off edge of a m high table. If it lands 2.3 m away, what is the initial horizontal velocity and the maximum height of the phone?

Q8 An old man is sick of his walker and wants to rid himself of it. He goes to the window of his nursing home room (which is 40 m above the ground), and tosses it out with a velocity of 3.38 m/s at an angle of 37° to horizontal. What is the maximum height of the walker above the ground and how long does it take to reach the ground?

A rude tourist throws a peach pit horizontally with 7.0 m/s velocity out of an elevator cage. The elevator is moving upward with a constant velocity of 8.5 m/s velocity. How long will it take the peach pit to land on the ground, 17.0 m below his initial position?