Question 1 A boy slides down a frictionless slide. If the boy wants to go half as fast at the bottom of the slide, by what factor should his parents decrease the height of the slide? O 0.75 O 0.25 O 0.50 O 2.0 Question 2 A B The balls are thrown from a cliff with the same speed but different angles. Which ball has the greatest speed just before it hits the ground? O Ball A O Ball B Ball C Balls A and C They all have the same speed.Question 3 A spring has an unstretched length of 14.0 cm. It exerts a restoring force Fwhen stretched to a length of 15.0 cm. At what length is the restoring force 5.F? 70.0 cm 20.0 cm 19.0 cm 2.80 cm Question 4 U() X In the figure provided, a 32.0 g particle is released from rest at x = 1.0 mm. What is the maximum speed of the particle? Assume mechanical energy is conserved. O 13.7 m/s O 17.7 m/s O 6.85 m/S O 0.433 m/S