1 1 point A 6.9 kg ball strikes a wall with a velocity of 6.2 m/s to the left. The ball bounces off with a velocity of 2.4 m/s to the right. If the ball is in contact with the wall for 0.07 s, what is the constant force in newtons exerted on the ball by the wall? Type your answer. 2 1 point A constant force is exerted on a cart that is initially at rest on a frictionless air track. The force acts for a short time interval and gives the cart a final speed. To reach the same speed using a force that is 1/5 as big, the force must be exerted for a time interval that is F. cart air track Type your