Use momentum conservation to analyze an explosion or explosion-like scenario to determine the post-explosion velocity of one of the objects.
An 75.1-kg male and a 48.8-kg female pair figure skating team are gliding across the ice at 7.40 m/s, preparing for a throw jump maneuver. The male skater tosses the female skater forward with a speed of 9.02 m/s. Determine the speed of the male skater immediately after the throw.
Speed of Male
m/s
A 2.29 kg cannon is at rest. When ignited, it fires a 57.1 g tennis ball forward with a speed of 87.5 m/s. Determine the post-explosion speed (in m/s) of the cannon.
Speed of Cannon
To Mr. H's disgust, a 890.0-g black crow is raiding the recently filled bird feeder. As Mr. H runs out the back door with his broom in an effort to scare the crow away, it pushes off the 659.0-gram feeder with a takeoff speed of 1.89 m/s. Determine the speed at which the feeder initially recoils backwards.
Speed of Feeder
A 1.46-kg cannon is mounted on top of a 2.80-kg cart and loaded with a 68.5 gram ball. The cannon, cart, and ball are moving forward with a speed of 2.81 m/s. The cannon is ignited and launches a 68.5-gram ball forward with a speed of 111 m/s. Determine the post-explosion velocity (in m/s) of the cannon and cart. Enter a + value for a forward velocity and a - value for a backward velocity.
Post-Expl'n V of Cannon
Skyler, whose mass is 68.4 kg, is moving across ice at 9.19 m/s while holding a 2.14-kg carefully-packed snowball. Skyler hurls the snowball forward with a speed of 16.6 m/s. Determine Skyler's velocity after throwing the snowball. Enter a negative value for a backward velocity and a positive value for a forward velocity.
Skyler's Final Speed
Kay's church youth group rented the community ice rink on Saturday night. Kay, whose mass is 44.9 kg, was on ice, holding a snowball, and moving towards Jada with a speed of 6.45 m/s. Kay hurls a 2.7-kg snowball towards Jada with a speed of 21.23 m/s relative to the ice. What is Kay's speed after throwing the snowball?
Final Speed of Kay
A 2.01-kg block is sliding down a 8.09-kg frictionless incline. Both are initially moving to the right at 10.4 m/s. If the block ends up moving to the right at 25.9 m/s on the horizontal surface, determine the final velocity of the incline (in m/s). Indicate the direction using a + (right) or – (left) sign.
Final Velocity of Incline