How fast is Dan going as his feet hit the ground?

By Allen Kazadi

Dan is gliding on his skateboard at 2.00 m/s. He suddenly jumps backwardoff the skateboard, kicking the skateboard forward at 8.00 m/s (as measured by an observeron the ground). Dan’s mass is 60.0 kg and the skateboard’s mass is7.00 kg.
How fast is Dan going as his feet hit the ground?

Answer:

Dan is going about 1.30m/s fast as his feet hit the ground.

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