collisions practice questions
Authored by Manisha Gugnani
Physics
9th Grade
NGSS covered
Used 6+ times
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15 questions
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1.
OPEN ENDED QUESTION
3 mins • 1 pt
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
2.
OPEN ENDED QUESTION
3 mins • 1 pt
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
3.
OPEN ENDED QUESTION
3 mins • 1 pt
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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4.
OPEN ENDED QUESTION
3 mins • 1 pt
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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5.
OPEN ENDED QUESTION
3 mins • 1 pt
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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6.
OPEN ENDED QUESTION
3 mins • 1 pt
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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7.
OPEN ENDED QUESTION
3 mins • 1 pt
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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