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by BlastRoom
Treat events that start from rest as momentum-conserving separations.
#physics
20 questions
One question set, multiple game modes. Tap any game to see it in action. Not sure which to pick?
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Earn blasts, then hunt the other team.
Answer to earn energy, then climb.
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Answer, restock, and serve the rush.
More correct answers pulls the rope your way.
Answer, then shoot down the alien wave.
Answer, then tap to leap the frozen ridge.
A 4.0 kg cart and a 0.20 kg puck are initially at rest on a frictionless track. The puck is launched to the right at +10 m/s. Take right as positive. What is the cart's velocity?
A 2.5 kg launcher at rest fires a 0.050 kg pellet forward at +300 m/s. Take the pellet's direction as positive. What is the launcher's velocity just after firing?
A shell at rest separates into a 0.60 kg piece moving at +24 m/s and a 0.90 kg piece. Take the + direction as the first piece's motion. What is the 0.90 kg piece's velocity?
Two gliders are held together at rest on a level air track. The 0.80 kg glider moves left at −1.5 m/s after release. Take right as positive. What is the 1.20 kg glider's velocity?
A 1.5 kg launcher at rest fires a 0.030 kg ball to the right at +80 m/s. Take right as positive. What is the launcher's velocity just after the ball leaves?
A 6.0 kg raft and a 2.0 kg crate start at rest on frictionless ice. The crate slides right at +3.0 m/s. Take right as positive. What is the raft's velocity?
A 0.12 kg cap and a 1.8 kg base start at rest. The cap shoots left at −50 m/s. Take right as positive. What is the base's velocity just after separation?
An object at rest splits into a 3.0 kg fragment moving right at +4.0 m/s and a 1.0 kg fragment. Take right as positive. What is the 1.0 kg fragment's velocity?
Use the figure. Take right as positive. What is skater P's velocity just after the push?
Use the figure. Take right as positive. What is cart A's velocity just after the spring release?
The figure shows two blocks released from rest on a frictionless track. Take right as positive. What is block L's velocity after release?
Use the figure. Take right as positive. What is cart X's velocity just after the carts separate?
Use the figure. Take right as positive. What is the platform's velocity just after the object is launched?
The figure shows two pieces separating from rest. Take right as positive. What is piece A's velocity after separation?
A shell at rest separates into two unequal pieces on a frictionless surface. How do the pieces' momenta compare immediately after separation?
Two students on low-friction carts start at rest and push apart. Student A has greater mass than student B. Which statement best explains their speeds?
Before an internal spring is released, two gliders are held together at rest on a level air track. What is the total momentum immediately before and after release?
A 0.20 kg part and a 1.00 kg part separate from rest on a frictionless track. Which part has the greater speed immediately after separation?
Two carts are held together on a frictionless track with a compressed spring between them. When released from rest, both carts move. Where did their kinetic energy come from?
A firecracker at rest bursts into two pieces that move away from one another. Where did the pieces' kinetic energy come from?
Crack the passcode before the zombies get in.
Answer, then swat bugs for bonus points.
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Simple Harmonic Motion
30 questions
