Froggy Jumps 11TH GRADE, MOMENTUMOnline version PROBLEM SOLVING by gaukhar 1 A 2 kg ball is moving with a velocity of 5 m/s. What is the momentum of the ball? a 10 kg·m/s b 5 kg·m/s c 2 kg·m/s 2 A force of 20 N acts on a body for 3 seconds. What is the impulse given to the body? a C) 60 J b 20 N·s c 60 N·s 3 Two ice skaters, one with a mass of 50 kg and the other with a mass of 70 kg, push off each other while on ice. If the skater with mass 50 kg moves with a velocity of 4 m/s, what is the velocity of the second skater after the push? a 2.9 m/s b 3.2 m/s c 4.0 m/s 4 A 1.5 kg object is dropped from a height of 10 m. What is the object's velocity just before it hits the ground, assuming no air resistance? (Take g=9.8m/s2) a A) 12.5 m/s b B) 14.0 m/s c C) 15.5 m/s 5 A 1 kg ball moving at 3 m/s collides elastically with a stationary 2 kg ball. After the collision, the 1 kg ball moves with a velocity of 1 m/s. What is the velocity of the 2 kg ball after the collision? a 1 m/s b 2 m/s c 3 m/s 6 A 3 kg car moving at 6 m/s collides inelastically with a 2 kg car at rest. After the collision, both cars move together. What is the velocity of the combined system? a 4.0 m/s b C) 4.5 m/s c D) 5.0 m/s 7 A 0.5 kg ball is thrown against a wall with a velocity of 4 m/s. The ball bounces off the wall with the same speed but in the opposite direction. What is the impulse exerted on the ball by the wall? a 1 N·s b 2 N·s c 4 N·s 8 A 0.8 kg ice skater is initially at rest. A horizontal force of 5 N acts on the skater for 4 seconds. After the force is applied, the skater moves with a velocity of 3 m/s. What is the impulse exerted on the skater during this time? a 2.4 N·s b 3.2 N·s c 5.2 N·s 9 A 0.5 kg ball moving at 6 m/s collides elastically with a 1.5 kg ball initially at rest. After the collision, the 0.5 kg ball moves with a velocity of 2 m/s in the opposite direction. What is the final velocity of the 1.5 kg ball after the collision? a 1.5 m/s b 2.5 m/s c 3.0 m/s 10 A 4 kg block moving with a velocity of 3 m/s collides inelastically with a stationary 6 kg block. After the collision, the two blocks stick together and move as a single object. What is their common velocity after the collision? a B) 2.0 m/s b C) 2.5 m/s c D) 3.0 m/s 11 A 0.3 kg ball is thrown towards a wall with a velocity of 8 m/s. The ball rebounds off the wall elastically, with the same speed but in the opposite direction. What is the change in momentum of the ball? a 2.4 N·s b 4.8 N·s c 7.2 N·s
New game