Problem 3.7 A particle of mass m is initially at rest at x = 0. It is acted upon by a force F = A cosh Bt. (a) Determine the velocity and position of the particle at time t. Fo (b) Show that at very small values of t, the position is approximately given by x(t) = ½ ( m force at time t = 0. (et/B²). Fo 1 Fo (c) Show that for large values of t, the position is approximately given by x (t) = m = t2, where

Parts D-F only

Please only Part A and C; thank you! A ball of mass 0.472 kg moving east (+x direction) with a speed of 3.80 m/sm/s collides head-on with a 0.236 kg ball at rest. Assume that the collision is perfectly elastic. Part A What is be the speed of the 0.472-kg ball after the collision? Express your answer to three significant figures and include the appropriate units. v1=_____________   Part C What is the speed of the 0.236-kg ball after the collision? Express your answer to three significant figures and include the appropriate units. v2=____________   Note: The direction of velocity of both v1 and v2 is to the east.

Part A A block of mass 2.55 kg slides down a 30.0° incline which is 3.60 m high. At the bottom, it strikes a block of mass 7.60 kg which is at rest on a horizontal surface. (Assume a smooth transition at the bottom of the incline.) (Figure 1) If the collision is elastic, and friction can be ignored, determine the speed of the block with mass 2.55 kg after the collision. v'm = ΕΠΙ ΑΣΦ Submit Request Answer Part B ? m/s If the collision is elastic, and friction can be ignored, determine the speed of the blockwith mass 7.60 kg after the collision. = 跖 ΑΣΦ Submit Request Answer ་ Part C How far back up the incline the smaller mass will go. ΜΕ ΑΣΦ d = Submit Request Answer ? ? m m/s