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An object of mass 5 kg is projected with a velocity of 20m/s at angle of 60° to the horizontal at the highest point of its path the projectile explodes and breaks up into two fragment of mass 1kg...

Two metal balls are moving toward each other along the x axis with the same initial speed of 4.2 m/s. Ball A with 3 times the mass of ball B is moving to the right while Ball B is moving to the left...

A 105 kg astronaut wearing a 35 kg jetpack is moving away from the space shuttle at 3.5 m/s horizontally to the right. The jetpack then pushes pushes the pack towards the shuttle with a force of 150...

An ice puck travelling due east at 3.6 m/s on frictionless ice collides head on elastically with an identical ice puck travelling due west at 5.2 m/s. Find the velocities of the two pucks after the...

A freight car with a mass of 3.5 x 105 kg traveling at 5 m/s connects itself to another identical freight car at rest. What is their final speed together after the collision

a baseball  pitcher throw a 145 gram fastball at 90 mph if an average batter is able to make contact with the ball for 0.7 milliseconds

Rob has a mass of 75 kg and stands on a frozen lake at rest. Suddenly, Rob’s 45-pound dog comes running across the ice at 4.6 m/s and collides with Rob. How fast does Rob and his dog move together...

A 20-gram rubber bullet traveling at 150 m/s hits a stationary 8.5 kg concrete block. If the bullet bounces off of the block in the opposite direction at 100 m/s, what is the final speed of the concrete...

If an average batter is able to make contact with the ball for 0.7 milliseconds how much force would it take for the batter to hit the ball outward at 106 mph to hit a home run