answer all the qurtions

in a circus a spring loaded cannon is used to shoot a human cannonball (with a mass of 52.2 kg) over a net that is 7.5 m high. The spring in the cannon has a spring constant of 780 N/m and is compressed 4.5 m. As the human cannonball just clears the net, he is moving at a speed of 3.3 m/s. How much energy (in units of J) was dissipated by air resistance as the person just cleared the net? (use g=9.81 m/s2 , round to exact number and use - sign if answerisnegative) 2) A child and sled with mass of 42.7 kg slide down a hill with a height of 3.07 m.

If the sled starts from rest and has a speed of 4.6 m/s at the bottom, how much thermal energy in units of joules is lost due to friction. (This will be the work done.) (use g=9.8 m/s2 and be accurateto2decimals) 3) A 54.7 kg woman runs up a flight of stairs in 5 s. Her net upward displacement is 5 m. What power did the woman exert while she was running (in units of W and to 2 decimals usingg=9.81m/s2)? 4) A child and sled with mass of 55.4 kg slide down a frictionless hill. If the sled starts from rest and has a speed of 6.00 m/s at the bottom, how high is the hill in meters to 3 decimals? (use g= 9.81 m/s2) 5) In a circus a spring loaded cannon is used to shoot a human cannonball (with a mass of 51.5 kg) over a net that is 7.5 m high. The spring in the cannon has a spring constant of 780 N/m and is compressed 4.5 m. As the human cannonball just clears the net, he is moving at a speed of 3.3 m/s. How much energy (in units of J) was dissipated by air resistance as the person just cleared the net? (use g=9.81 m/s2 , round to exact number and use - sign if answer is negative) 6) A 58.1 kg woman runs up a flight of stairs in 5 s. Her net upward displacement is 5 m. What power did the woman exert while she was running (in units of W and to 2 decimals using g=9.81 m/s2)?

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