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The velocity of a skateboard

Hi! Can someone check my answers? Thanks!! :)Question 1: A skateboarder (coasting with a constant velocity) jumps straight up.
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2. asked by Tonya
3. 740 views
a 65 kg skateboarder is standing on a stationary .5 kg skateboard. the skateboarder steps off the skateboard with a horizontal
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2. asked by Anonymous
3. 656 views
A 65 kg skateboarder is standing on a stationary .5 kg skateboard. the skateboarder steps off the a skateboard with a horizontal
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2. asked by Anonymous
3. 668 views
A boy moves on a skateboard at a constant velocity of 3m.s . The combined mass of the boy and the skateboard is 40kg. He catches
1. 3 answers
2. asked by N
3. 1,377 views
A 65 kg person runs with a horizontal velocity of 3.5 m/s and jumps onto an 0.9 kg skateboard which is initially at rest.Assumin
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2. asked by bob
3. 495 views
A 55 kg person runs with a horizontal velocity of 8.0 m/s and jumps onto a 7 kg skateboardwhich is initially at rest. Assuming
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2. asked by Jarrid
3. 523 views
A 55 kg person runs with a horizontal velocity of 8.0 m/s and jumps onto a 7 kg skateboardwhich is initially at rest. Assuming
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2. asked by Jarrid
3. 548 views
A boy of mass 54.3 kg is initially on a skateboard of mass 2.00 kg, moving at a speed of 10.4 m/s. The boy falls off the
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2. asked by Anonymous
3. 663 views
A boy of mass 54.3 kg is initially on a skateboard of mass 2.00 kg, moving at a speed of 10.4 m/s. The boy falls off the
1. 0 answers
2. asked by Anonymous
3. 709 views
A boy of mass 54.3 kg is initially on a skateboard of mass 2.00 kg, moving at a speed of 10.4 m/s. The boy falls off the
1. 0 answers
2. asked by Anonymous
3. 673 views