Q1. A race car has the mass of 702 kg. It starts from rest and travels 45.0 m in 3.0 s. The car is uniformly accelerated during the entire time. What net force is exerted on it?
Q2. When G was first measured by Henry Cavendish, newspapers of the time hailed his experiment as "weighing Earth experiment." And Why?
Q3. Sam, whose mass is 75.0 kg, takes off down a 57.0 m high, 13.0^circ slope on his jet-powered skis. The skis have a thrust of 230 N. Sam's speed at the bottom is 38.0 {rm m/s}. What is the coefficient of friction of snow?