4) A toy wood block of mass m1= 3.25 kg is pushed by hand to compress a spring with a spring constant k= 550 N/m a distance As = 25cm. The toy block is released by the hand and the spring launches the toy block across a frictionless surface toward a more massive wood block ofimass mom 5.0 kg. The 3.5 kg wood block is moving with an unkown velocity right before it collides with the more massive wood block which is at rest. After the collision, the 5.0 kg block is moving to the right with a velocity of 3 m/s. The more massive 5.0 kg block encounters a long rough section of surface having a coefficient of kinetic Uk0,22 and is eventually brought to rest. a) Find the velocity of the 3.25 kg block just before the collision. b) Find the velocity of the 3.25 kg block just after the collision c) What is the system's energy just before the collision? d) What je the

A 105 kg guy runs at 3.25 m/s down the parking lot to catch a cart before it hits his car. The cart seems to gain speed as it rolls in the lot causing the guy to change his velocity to 4.5 m/s over a period of 0.77 seconds. What force did the guy use as he changed his velocity

Two objects m1 = 5.15 kg and m2 = 2.95 kg)are connected by a light string passing over a light, frictionless pulley as in the figure below. The 5.15-kg object is released from rest at a point h = 4.00 m above the table. (a) Determine the speed of each object when the two pass each other. m/s(b) Determine the speed of each object at the moment the 5.15-kg object hits the table. m/s(c) How much higher does the 2.95-kg object travel after the 5.15-kg object hits the table? m