20-g bullet is fired at a 5-kg square panel of side b = 300 mm. The velocity of the bullet just before the collision is 500 m/s, with θθ = 15°, and is embedded into the plate after impact with a duration of 2.5 × 10-3 seconds. Knowing that the horizontal component of the impulsive reaction at A is zero, what is the value of the impulsive reaction at the support at A?

Please solve all part I have no idea

Problem 81. The two mine cars of equal mass are connected by a rope which is initially slack. Car A is given a shove which imparts to it a velocity of 4 ft/sec with car B initially at rest. When the slack is taken up, the rope suffers a tension impact which imparts a velocity to car B and reduces the velocity of car A. 4 ft/sec (a) If 40 percent of the kinetic energy of car A is lost during the rope impact, calculate the velocity v imparted to car B. (b) Following the initial impact, car B overtakes car A and the two are coupled together. Calculate their final common velocity vc. ~ B S A S

Two balls, B1 and B2 each with  are initially resting on the floor. They are 15 centimeters apart B1 is to the left of B2. B3 with mass of 2kg rolls in from the right at 3.00 metres per second and strikes B2. After that collision B3 is traveling at 2.00 metres per second to the right. B2 strikes B1. After that collision B2 is traveling at 1.00 metre per second to the right. What is the velocity and direction of B1 after that collision?