题目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.Mkmm0...
(b) A motion sensor is used to measure the velocity of a ball falling vertically towards the ground,as illustrated in Fig. 3.1.motion sensor V-A Bground Fig. 3.1The ball passes through points A and B as it falls. The ball has a mass of 1.5kg. 相关知识点: 试题来源: 解析 (7...
1. A ball is thrown directly upwards with an initial velocity of 20m/s. Determine the ball’s maximum height and the time it will take for the ball to fall from its maximum height to the ground. (10 marks) h=1/2*m*v^2/(mg)=20 m (here, v^2 stands for v², g=10 m/s^...
-1. It undergoes an acceleration of magnitude 10 ms-2 in a direction parallel with the vector (3 i-4 j). Work out the velocity and displacement of the snooker ball from its initial position after four seconds. 相关知识点: 试题来源: 解析 31 ms-1and 124 m ...
(2) Nick hits a golf ball with initial velocity of 50 ms-1 at 35° to the horizontal.a)find the horizontal and vertical components of the ball's initial velocity b) specify suitable axes and calculate the position of the ball at one second intervals for the first six seconds of its...
How high will it go? (Ignore air resistance) A. 10 m B. 20 m C. 30 m D. 40 m 相关知识点: 试题来源: 解析 B。根据竖直上抛运动的公式 h = v₀²/2g ,代入数据可得 h = 20²/(2×10) = 20 m 。选项 A、C、D 均是计算错误。反馈 收藏 ...
A ball moving at a velocity of 10 m/sec has a momentum of 8.0 kg-m/sec. What is its mass? A golf ball has a mass of 0.05 kg and acquires a speed of 80.0 m/s when hit with a force of 3000 N. How long was the club in contact wit...
The outer joint part forms an introducing aperture for the ball cage. The ball cage, while engaging the outer tracks, can be threaded into the outer joint part in the second axial direction. The outer joint part forms a first stop and guiding face for a spherical outer face of the ball ...
A golf ball shown in Fig is hit from ground level with an initial velocity u=30\ ms^(-1) at an angle 60^(° ) to the horizontal.u=30\ m\ s^(-1)Calculatethe vertical component of the initial velocity u,Vertical component of the initial velocity = () ms^(-1)...
A baseball is thrown with an initial velocity of magnitude v at an angle of 24.4 with respect to the horizontal (x) direction.At the same time,a second ball is thrown with the same initial speed at a different angle with respect to x.If the two balls land at the same spot,find ....