A 2200kg car travelling at 30ms collides with another 2200kg car that is at rest. The two bumpers lock and the cars move forward together. What is their final velocity?

Hockey puck A (2kg) travels with a velocity of 40ms to the right when it collides with hockey puck B (1.6kg), which was originally at rest. After the collision, puck A is stationary. Assume no external forces are in play and that the momentum of the pucks are conserved. What is the final velocity of puck B after the collision?

A 12kg ball moving at 37ms strikes a second ball at rest. After the collision the 12kg ball is moving with a velocity of 19ms and the second ball is moving with a velocity of 4ms. What is the mass of the second ball?

more than, less

less than, more

the design of a ski jumping suit involves a trade-off between giving the skiers lift to get higher jumps and ensuring the skier does not face a lot of drag before the jump itself. an expansive suit may to lift the skier higher, but at the same time, it will also increase the air resistance. higher air resistance as the skier goes down the slope limits the speed of the jump. a big suit also increases the risk of losing balance or control, especially if there's a strong gust of wind. while technologically enhanced suits a lot, clothing is not the only factor in a ski jumper’s success. gathering speed while skiing down the slope, ensuring good speed on the ramp, and maintaining good body posture and form in the air all contribute to a ski jumper's success.

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