A bike and a rider have a mass of 210 kg and a speed of 19 m/s. What is the shortest distance he can stop? us=0.9 uk=0.75

The fishing boat was moving on a river. The paddle fell into the water as it crossed the bridge. After an hour, the fisherman notices the disappearance of the paddle and turns back, finding his paddle 6 km below the bridge. How fast is the river? (Suppose the speed of the (fisherman is the same in the opposite direction of the water

a child slides down a spiral slide from 2.5 m from the ground, the bottom of the slide is 50 cm from the ground. What is the closest speed at which the child leaves the slide?

A car drives straight off the edge of a cliff that is 84.0 m high. The police at the scene of the accident note that the point of impact is 125 m from the base of the cliff. How fast was the car traveling when it wentover the cliff?

3. A boulder rolls over a 50m high cliff. How fast was the boulder moving if it was found 180 m on the ground? At what time did the boulder hit the ground? At what velocity was it approaching the ground?

A paperclip falls to the ground for 8.36 seconds. What is the speed of the paperclip just before it hits the ground? You can assume no air resistance. Round to 1 decimal.    Imagine a ball that is pushed off a desk completely horizontal and falls 9.74 m down to the floor. If it landed 8.56 m away from the edge of the desk, how fast was it moving in the horizontal direction just before it hit the ground? Round to 1 decimal.

An airplane starts from 19.4 m/s and accelerates at 18.7 m/s2. What is its speed at the end of a 482m runway?

You shoot a ball straight up with an initial speed of 8490 m/s. When the surface of the earth, what is the speed of the ball? O 2146 m/s reaches a height of 4.0 x 10 6 m above O 2956 m/s O 3546 m/s 4009 m/s 4588 m/s O 4876 m/s

A child throws a stone downward from the top of a cliff with a speed of 4m/s. You notice that it took 2 seconds for the stone to hit the ground. What is the height of the cliff? (Start with a function for the acceleration using g ≈ 9.8m/s2 .

v (m/s) 1.0 0.5 t (s) 0.60 0.20 0.40 FIGURE P2.18