You throw a ball on planet X where g is not the same as on Earth. The figure below shows the vertical velocity of the ball after it leaves your hand. Air resistance is not important. m) 18.0 120 6.0 -6.0 -120 -18.0 10 20 30 1. Find the gravitational acceleration on planet X. You hit a golf ball into the air with an initial horizontal speed of 20 m/s and an initial vertical upward speed of 48 m/s on planet X. Neglect air resistance. 2. Find the maximum vertical displacement of the ball. 3. Find the horizontal displacement when the ball is at its maximum vertical displacement.

Leonard Kicked a 0:50 Kg ball off the rooftop of a building that is 81 m tall. He oriented the kick at 45° above the horizon and with the speed of 15 m. Then Sheldon caught the ball from the next building's balcony that is 46 m from the ground. Sheldon then released the ball from the said height and let the ball fall to the ground a. What is the speed of the ball just before it reaches Sheldon? = = /2 mv ₁ ²) 2 (use the formula: mg Ch₁ - h₂) + = = mv ²0 2

Mike uses a block sliding down an inclined plane to estimate the coefficient of kinetic friction, uk, between the block and the plane. He adjusts the inclined plane to an angle 45° above the horizontal, and allows the block to slide down the plane from rest. He uses motion detector with a computer interface to get the velocity of the block when it reaches the bottom of the plane. The distance the block slides down the inclined plane is 1.15 m. The speed of the block at this point is 2.2 m/s. Using conservation of energy, estimate uz.

4. Two balls are thrown off the top of a building with the same speed. One is thrown off the roof at an angle of 30° and the other is thrown straight down. If air resistance can be ignored then a) both balls will hit the ground at the same time, b) the one thrown down hits the ground with a higher speed, c) the one thrown at an upward angle will hit the ground with a higher speed d) both balls will hit the ground with the same speed or e) both a and c.

Problem 7: A block of mass m = 59 kg slides along a horizontal surface. The coefficient of friction between the block and the surface is u = 0.29. The block has an initial speed of v, = 18 m/s in the positive x-direction as shown. m

A 2.0 kg wood block is launched up a wooden ramp that is inclined at a 30° angle. The block’s initial speed is 10 m/s. What vertical height does the block reach above its starting point? What speed does it have when it slides back down to its starting point?

The diagram shows a box moving down a green ramp, beginning from rest at the top of the ramp and ending at the bottom. The angle of the ramp's surface with the horizontal and the distance the box moves on the ramp from top to bottom are shown in the diagram. Given this information, how long does it take the box to reach the bottom of the ramp? Assume the surface of the ramp is frictionless and ignore air resistance. Use g = 9.81 m/s². Give your answer in units of seconds to two significant figures. When inputting your answer in the box below, enter a numerical value only (without the unit's symbol or name). Ax = 36 m 8 = 30°

G=25

Problem 7: A block of mass m = 59 kg slides along a horizontal surface. The coefficient of friction between the block and the surface is u = 0.29. The block has an initial speed of v, = 18 m/s in the positive x-direction as shown. m

In the rollercoaster shown in the figure, the height of the first hill is 24.5 meters, and the height of the second hill is 12.8 meters. The track of the rollercoaster is frictionless.    If the rollercoaster car’s velocity is 20.4 m/s, what was its velocity at the top of the first hill?  v =    m/s