Q1. A projectile whose mass is 9.4 kg is fired upward vertically. On its upward flight, energy of 68 kJ is dissipated because of air drag. How much higher would it have gone when the air drag had been made negligible?
a) 0.74 m
b) 1.25 m
c) 0.50 m
d) None of above.
Q2. You push a 2.0 kg block against the horizontal spring, compressing the spring by 15 cm. Whenever you release the block; the spring forces it to slide across the table top. It stops 75 cm from where you released it. The spring constant is around 200 N/m.
Determine the coefficient of kinetic friction between the block and table?