【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 (...
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 ...
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...
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 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...
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...
A small ball of mass 0.360 kg is attached to a string of length 1.25 m and revolved as shown in the figure below. The breaking tension of the string is 8.00 N. (a) What angle does the string make when the rope is just about to bre...
A ball of mass M moving with velocity V0 on a frictionless plane strikes the first of two identical balls, each of mass m=2kg, connected by a massless spring with spring constant k=1kg/s2(see Figure). Consider the collision to be central and elastic and essentially instantaneous.Mkmm00000...