Please answer all the questions. Thank you.

1)

A 0.588 kg object is at rest at the origin of a coordinate system. A 3.24 N force in the positive x direction acts on the object for 2.20 s. What is the velocity at the end of this interval? 1.21x101 m/s You are correct. Your receipt no. is 161-5185 ( Previous Tries At the end of this interval, a constant force of 4.26 N is applied in the negative x direction for 3.28 s. What is the velocity at the end of the 3.28 s? 11.64m/s Submit Answer Incorrect. Tries 5/99 Previous TriesTwo blocks of masses m1 = 1.99 kg and m2 = 4.77 kg are each released from rest at a height of h = 4.89 m on a frictionless track, as shown in the figure, and undergo an elastic head-on collision. ' m1 m9 Determine the velocity of the m1 block just before the collision. (Use positive sign if the motion is to the right, negative if it is to the left.) 9.79 m/s You are correct. . . Your receipt no. is 161-9923 W Determine the velocity of the m2 block just after the collision. (Use positive sign if the motion is to the right, negative if it is to the left.) 2.198m/s Submix Answer Incorrect. Tries 3/99 Previous Tries Determine the velocity of the m1 block just after the collision. (Use positive sign if the motion is to the right, negative if it is to the left.) 2.198m/s Submit Answer Incorrect. Tries 3/99 Previous Tries Determine the maximum height to which m2 rises after the collision. Submit Answer Tries 0/99 Determine the maximum height to which m1 rises after the collision. Submit Answer Tries 0/99 A 4.15 kg steel ball strikes a massive wall at 13.6 m/s at an angle of a = 55.6 with respect to the plane of the wall. It bounces off with the same speed and angle as seen in the figure. If the ball is in contact with the wall for 0.198 5, what is the average force exerted on the ball by the wall? Submit Answer Tries 0/99 A spring with a spring constant of 68N/m sits on a desk. The spring is 46cm long. Ablock of mass 0.52kg is placed on top of the spring. How high above the desk does the block rest? [1 = 141cm Submit Answer Incorrect. Tries 3/8 Previous Tries You hang a 5kg mass from a spring, which stretches 2.6m. You now link two of these identical springs end-toend and again hang a 5kg mass on them. How much does this longer (combined two-spring system) stretch? 1.3m 5.2m 2.6m o It doesn't stretch at all 7.8m Submit Answer Incorrect. Tries 1/2 Previous Tries