A man with a mass of 60 kg rides a bike with a mass of 13 kg. What is the force needed by the man to accelerate the bike at 0.90 m/s2?

When a 5.0kg cart undergoes a 2.2m/s increase in speed, what is the impulse of the cart

Contrast the force of gravity between these pairs of objects: 1-kg mass and a 2-kg mass that are 1 m apart; a 1-kg mass and a 2-kg mass that are 2 m apart; and two 2=kg masses that are 1 m apart. i dont understand.

Which of the following are molecules? a. al b. ag c. mgcl2 d. nacl e. c3h8