
Question 3: The coefficient of kinectic friction between crates A and B and the inclined surface...
Two particles A and B strike each other and then rebound. The coefficient of restitution between the two is 0.3. mA = 3.7 kg and mB = 4.2 kg. Before the collision vA = 2.2 j m/s and after vA'= 0.6 j m/s. What are the pre- and post-collision velocities of particle B? Answers: Before, vB = j m/s After, vB' = j m/s.
Two identical balls come into a collision with a coefficient of restitution e=0.8. Before the impact, VA = 7 m/s and V3 = 3 m/s. Their directions are as shown. Determine the magnitude of velocity of each ball after the impact. Include the following steps in your VB solution: a) Define a coordinate system appropriately. (3 pts) b) Calculate the two components of each velocity before the impact. (6 pts) c) Apply the right principle(s)/equation(s) to determine the component velocities...
Two identical pucks collide with coefficient of restitution e =0.8. Before impact, Va=7 m/s and Vb = 3 m/s. Determine magnitude of velocity of each puck after impact. Define coordinate system. Determine component velocities of each puck after impact. Calculate two components of each velocity before impact. 2001
3. A particle of mass m moves vertically downward with velocity vi and strikes a smooth triangular block of mass 2m which is initially stationary. Assuming a coefficient of restitution e, find the velocities of the block and the particle immediately after impact. Hints . The restitution of two object in one-dimensional collision means, γ = ta-ta, where vang are the velocities after the impact and va, vb are the velocities before the impact, obeying the same positive direction ....
Crates A and B weigh 110 lb and 60 lb, respect coefficient of kinetic friction between the crates and the from rest, the -0.22 ively. If they start ground is μ 4 P = 50 Ib a. Draw the free body diagram for both Crates. b. Find the frictional force acting on each crate. c. Write the Principle of Impulse and Momentum Eq.'s their speed when t
A 2-kg block is sliding on a plane inclined at 49 degrees. The friction coefficient between the block and the surface is 0.4. (a) The acceleration of the block is m/s2 (b) The minimum force to be applied to the block parallel to the incline to prevent the block from sliding is N.
The two disks A and B have a mass of 3 kg and 6 kg. respectively. They collide with the initial velocities shown. The coefficient of restitution is e = 0.7. Suppose that (VA)1 = 5 m/s, (vB)1 = 7 m/s. (Figure 1) Part D Determine the angle between the x axis and the velocity of B just after impact, measured clockwise from the positive x axis.
b) Disk A in Fig B2b has a mass of 2 kg and is sliding forward on the smooth surface with a velocity (%),-5 m/s when it strikes the 4 kg disk B. Disk B is coefficient of restitution between the disks is e0.4, compute the velocities of A and B just after collision. Hint Coefficient of restitution is defined as e where indices 1 and 2 mark velocities before and after impact respectively. Je Fig. B2b [8 marks]
PROBLEM 17.113 The slender rod AB of length L = 1 m forms an angle B = 30° with the vertical as it strikes the frictionless surface shown with a vertical velocity 7 = 2 m/s and no angular velocity. Knowing that the coefficient of restitution between the rod and the ground is e = 0.8, determine the angular velocity of the rod immediately after the impact.
4. Consider the blocks on the inclined surface above. They are attached by a steel rod that does not bend. Suppose the mass of block m 1=15 kg and has a coefficient of kinetic friction μ_k=.2, and a coefficient of static friction μ_s=.9 and θ=42 degrees. Suppose the mass of the second block is m2=25 kg.a. Suppose the masses are initially at rest. What is the minimum coefficient of friction of m2 required to stop both of them from sliding...