What is a cheeseburger without cheese

Abaseball has a mass of 0.145 kg and approaches a bat at 40.0 m/s. after it is hit, the ball leaves the bat at 50.0 m/s directly back. find the impulse of the bat on the ball. 7.25 kg*m/s 13.1 kg*m/s 5.80 kg*m/s 1.45 kg*m/s

According to newtons universal law of gravitation, which would change the parh of the ball so it traces out widest curved path possible?

Which system of units is used by only a small number of countries in the world, including the u. s.