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?

Tags

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?

Tags

NGSS.HS-PS2-2

NGSS.HS-PS2-1

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?

Tags

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.

Tags

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?

Tags

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?

Tags

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?

Tags

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?

Tags

NGSS.HS-PS2-2

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?

Tags

NGSS.HS-PS2-2