英文物理题 A ball of mass 0.100 kg is dropped from rest from a height of 1.25 m. It rebounds from the floor to reach a height of 0.840 m. What impulse(with direction) was given to the ball by the floor? 不是要翻译。。要答案 答案 let me try.Since the question is in English,i...
A ball of mass m is dropped from a height H. When it hits the ground, it rebounds to a height h. If the time of contact with the ground is t, and the average force exerted by the ground on the ball during the collision is F. Which of the following equations is correct accor...
A ball of mass 0.2kg is dropped from a height of 2.5 m above horizontal ground. After hittingthe ground it bounces to a height of 1.8 m above the ground. Find the magnitude of the impulsereceived by the ball from the ground. 相关知识点: 试题来源: 解析 2.59Ns (2 d.p.) 反馈...
A ball of mass o.8 kg is thrown against a wall. The ball strike the wall horizontally with a speed of 11 m/s, and it bounces back with the same speed. The ball is in contact with the wall for 0.05s. What is the average force exerted on the wall by the ball? A 350 N B 180...
11 A ball of mass 400 g rolls down a hill. 2.0 m above the bottom of the hill, the speed of the ball is 3 0 m/s.3.0 m/s2.0m The gravitational field strength g is 10 N/kg. Ignoring the effects of friction and air resistance, what is the kinetic energy of the ball at the...
题目 A boy caught a ball of mass 200g moving with a speed of 30 m/s. If the catching process be completed in 0.1 s, the average net force of impact exerted by the ball on the hands of the boy is A 30N B 20N C 40N D 60N 相关知识点: 试题来源: 解析 D 反馈 收藏 ...
【题目】 一道英文物理题哦 A ball o f mass m is attached to a string o f l ength L .It is swung in a vertical circl e with enough sp eed to keep the string taut throughout th e motion. Assum e the ball travels freely in th e circl e with negligibl e loss o f mec hani...
A mass of 2kg is dropped from a height of 3m. Neglecting air resistance, KE of the stone just before it hits the ground is? Kinetic Energy in Free Fall The final kinetic energy of a body after free fall from certain height is given...
1一道英文物理题哦A ball of mass m is attached to a string of length L .It is swung in a vertical circle with enough speed to keep thestring taut throughout the motion. Assume the ball travelsfreely in the circle with negligible loss of mechanical energy.Determine if the following six sta...
4 A hard ball of mass 1.0 kg falls freely from rest through a height of 80 m and comes to rest having penetrated 9.0 cm of sand.A80m Sand9.0 cm BFig. 4.1(a) Describe how the energy changes as the ball falls from A to B.(b) Determine the velocity of the ball just before it...