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...
【题目】A ball of mass 200 g travelling horizontally at 6m s- strikes a verticalwall at right angles and rebounds with a speed of 4ms-. Find themagnitude of the impulse given to the ball.Assuming that contact between the ball and the wall lasts for0. I seconds, find the force (...
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 ...
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...
{eq}\displaystyle m = 100\ g {/eq} is the mass of the ball {eq}\displaystyle r = 2\ cm {/eq} is the sphere radius Density is defined as... See full answer below.d as mass over volume. So let us first determine the volume of this sphere. We use th...
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 m falls from a height h to the surface of the Earth.Which one of the following is correct?(assume that h is much smaller than the radius of the Earth)A) If we choose our system to be ball+Earth then the work done on the system is mgh.B) If we choose our s...
Find the coefficient of restitution. View Solution A ball of mass 10 g falls from a height of y 5 m. It rebounds from the ground to a height of 4m. Find : (a) the initial potential energy of the ball, (b) the kinetic energy of the ball just before the ground. striking the ...
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...