You throw a doughnut with a mass of 0.10 kg straight up from the ground and it reaches a maximum height of 20.0 m. How much kinetic energy does the doughnut have when it is 15.0 m above the ground? (assume no air resistance)

You throw a doughnut with a mass of 0.10 kg straight up from the ground and...
2) You throw a ball straight up with an initial velocity 15.0 m/s a) How high does it go? Ignor e the air resistance. (1 mark) b) How long does it take for the ball to reach its maximum height? (1 mark) What is the ball velocity when the ball is 6.00 m above the initial throwing point? c) (1 mark) What is the velocity of the ball when it back to initial point? (1 mark) d)
2) You throw...
An object with mass 12.0 kg is fired from the ground with a speed of 15.0 m/s at an angle of 28.0 degrees with respect to the horizontal. What is its kinetic energy when it reaches its maximum height?
Assume that the maximum horizontal distance you can throw a baseball (m = 0.145 kg) at an angle of α0 = 45∘ above the horizontal is 25 m. Part A) What is the kinetic energy of the baseball just after it leaves your hand? Ignore air resistance and the small distance the ball is above the ground when it leaves your hand. Take the zero of potential energy to be at the ground. Part B) At the ball's maximum height,...
You throw a rock straight up with a speed of 10 m/s. Neglect the effects of air resistance in. 8. When the rock in the above example reaches its maximum height its velocity and acceleration are both zero. True or False. ________________________ Explain your answer.
A rock of mass 2.0 kg is thrown upwards from the ground and its reaches a height of 15.0 m (it is not the max height!) where its speed is 25.0 m/s. a) Find the work done by gravity up to 15.0 m of upwards displacement. b) Find the rock’s speed as it leaves the ground using the work-kinetic energy theorem. c) Find the max height it reaches
013 (part 1 of 4) 10.0 points You throw a softball (of mass 200 g) straight up into the air. It reaches a maximum altitude of 13.9 m and then returns to you What is the gravitational potential energy of the soft ball at its highest position? Assume the ball departed from and returned to ground level. Answer in units of J. 014 (part 2 of 4) 10.0 points Assume no energy is lost by the softball while it is...
A ball of mass 0.083 kg is shot straight up in the air using a compressed spring. The spring has a spring constant of 328 N/m and is compressed by 0.05 m initially. The ball reaches a height of 0.252 m above the initial position. How much energy has dissipated due to frictional effects such as air drag ? (in J)
A car of mass 1100 kg starts from rest at sea level and climbs a hill of height 50.0 m. At the top of the hill, the car has a speed of 25.0 m/s, and at this instant, the driver shuts off the engine of the car. The car then coasts down the other side of the hill to height of 15.0 m above sea level. Assume that friction and air resistance are negligibly small. a) (6 pts) How much...
(10 marks) A small catapult is used to launch 1.5 kg water balloons straight up into the air. A clever student is able to measure the speed of the water balloon while it is rising up into the air. She finds that the water balloon is 8.0 m above the catapult it is moving at a speed of 20.0 m/s. (For the purposes of this question, assume that the catapult is positioned in a small hole so that the height...
(10 marks) A small catapult is used to launch 1.5 kg water balloons straight up into the air. A clever student is able to measure the speed of the water balloon while it is rising up into the air. She finds that the water balloon is 8.0 m above the catapult it is moving at a speed of 20.0 m/s. (For the purposes of this question, assume that the catapult is positioned in a small hole so that the height...