A boy throws a ball upwards from the roof of a moving car and then catches it when the car has travelled 100 m down the road. He throws the ball up again and it goes vertically four times higher than before. How far has the car travelled this time when he catches it again?
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- A golf ball is hit horizontally off the edge of a 26 m high cliff and lands a distance of 29 m from the edge of the cliff. In seconds, at what time did the golf ball hit the ground?2. A stone was accidentally dropped from the top of a building 56 m high. After 0.38 s, another stone was thrown vertically downward from the top of the same building. It was observed that the two stones hit the ground at the same time. What was the initial velocity given to the second stone? (Answer: 4 m/s, downward) Give the solution for this (given, solution)A man is standing on a cliff which is 100 m above the lake. He throws a stone horizontally with a speed of 10m/s to the lake. What is the straight-line distance between the man and the stone when it hits the water?
- Standing at the edge of a 70 meter high cliff, Failee throws a rock with a horizontal velocity of 21 m/s. How long is the rock in the air, and how far does it travel horizontally before striking the water ?2. A stone is dropped from the upper observation deck of the CN Tower, 450 meters above the ground. (a) Find the distance of the stone above the ground level at time t. (b) How long does it take the stone to reach the ground? (c) With what velocity does it strike the ground? (d) If the stone is thrown downward with a speed of 5 meters per second, how long does it take to reach the ground?In 1948 United States Air Force pilot Gail halvorsen became known as the Berlin Candy Bomber when he began dropping candy bars and Bubblegum to the children of Berlin. If he was flying with a forward velocity of 100 meters per second at a low altitude of 1000 m how far from the Berlin Wall would he have to release the candy so that it would land in the city?
- A ball is launched vertically upward from ground level at 15.0 m/s. What is its height when its speed is 5.0 m/s? O 10.2 m the ball never has a speed of 5.0 m/s 26.8 m 4.85 m 14.1 mSome troublemaking kids are dropping water balloons from the roof of your apartment building. You are in your fifth-floor room and your window is 25 m above the sidewalk outside. You look outside and see that each balloon hits the pavement 1.5 s after passing your window. Express answers using 2 significant figures. a) How fast are the balloons traveling when they pass your window? b) Assuming the balloons are being released from rest, from what height above your window are they being released? c) If you threw a balloon upwards from your window with an initial speed of 6.5 m/s, would you be able to get it to the roof?For the machine element shown, locate the y coordinate of the center of gravity.
- Moving sidewalks are installed every other 50 meters along the entire stretch of an airport walkway. These sidewalks move at a constant speed of 1 m/s. A lady passenger takes one of the sidewalks to go from one point to the next. If the passenger decides to go back using the same sidewalk at 1 m/s, how long will it take to reach her point of origin?A pirate ship launches a cannon ball with an initial speed of 200 m/s. The ball is to strike an enemy ship that is exactly 3.0 km from the cannon. What is the minimum time-of-flight for the ball? (-1,3)m (1,-3)m (-1,2)m (-1,7)m (-1,12)m (1,7)mA person sitting on the ground floor of a building notices through the window, of height 1.5 m, a ball dropped from the roof of the building and crosses the window in 0.1 s. What is the velocity of the ball when it is at the topmost point of the window? (g-10 m/s²) (1) 20 m/s (2) 15.5 m/s (3) 14.5 m/s (4) 4-5 m/s