collisions practice questions

A 15,500 kg railroad freight car travels on a level track at a speed of 5.4 m/s. It collides and couples with a 30,000 kg second car, initially at rest and with brakes released. What is the speed of the two cars after collision?

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NGSS.HS-PS2-2

A 55 kg skater at rest on a frictionless rink throws a 3 kg ball, giving the ball a velocity of 8 m/s. What is the velocity of the skater immediately after?

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NGSS.HS-PS2-1

NGSS.HS-PS2-2

A 13,500 kg railroad freight car travels on a level track at a speed of 4.5 m/s. It collides and couples with a 25,000 kg second car, initially at rest and with brakes released. No external force acts on the system.  What is the speed of the two cars after the collision?

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NGSS.HS-PS2-2

A cannon ball with a mass of 100.0 kg flies in horizontal direction with a speed of 250 m/s and strikes a ship initially at rest. The mass of the ship is 15,000 kg. Find the speed of the ship after the ball becomes embedded in it.

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NGSS.HS-PS2-2

A 40 kg girl skates at 5.5 m/s on ice toward her 70 kg friend who is standing still, with open arms. As they collide and hold each other, what is their speed after the collision?

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NGSS.HS-PS2-2

A 5 kg cannon ball is loaded into a 300 kg cannon. When the cannon is fired, it recoils at -5 m/s. What is the cannon ball's velocity after the explosion?

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NGSS.HS-PS2-2

Two railcars, one with a mass of 4000 kg and the other with a mass of 6000 kg, are at rest and stuck together. To separate them a small explosive is set off between them. The 4000 kg car is measured travelling  at 6 m/s. How fast is the 6000 kg car going?

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NGSS.HS-PS2-2

Two objects, m1 and m2, have an elastic collision.  The initial velocity of m1 is +8.0 m/s and of m2 is -4.0 m/s.  After the collision, the velocity of m1 is +5.0 m/s.  What is the velocity of m2?

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NGSS.HS-PS2-2

Two objects have an elastic collision.  One object, m1, has an initial velocity of +4 m/s and m2 has a velocity of -3 m/s.  After the collision, m1 has a velocity of 1 m/s. What is the velocity of m2?

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A bowling ball has a velocity of +v when it collides with a ping pong ball that is at rest. The velocity of the bowling ball is virtually unaffected by the collision.  What will be the speed of the ping pong ball?

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NGSS.HS-PS2-2