Dave is riding his skateboard and pushes off the ground with his foot. This causes him to accelerate at a rate of . Dave weighs 589 N. How strong was his push off the ground?

A 15 kg block and a 10 kg block are hanging on opposite sides of a pulley (see picture). Assuming a frictionless, massless pulley, determine the acceleration of the blocks once they are released from rest.

Two objects apply forces to each other. The force on one of the blocks as a function of time in the x-direction is , where and are constants. What's the force as a function of time in the x-direction on the other block? Assume no other forces are present besides the forces the objects apply to each other.

A cat of mass 5kg jumps on a dining table of mass 30kg. As the cat walks around on the table, what is the average force that the table applies to the cat?

A locomotive is pushing a train at a constant velocity of . How does the force exerted by the locomotive on the train relate to the force of the train on the locomotive?

Two men are having a shoving contest, each man pushes the other at the exact same time. Ross pushes Jake with of force and Jake pushes Ross with of force. How much force is exerted on Jake?

A book exerts a force of 2N downwards, into a chair that exerts a force of 5N dowwards to the floor it stands on. What is the force that the floor exerts upwards on the chair?

Two cars, one of mass 500kg and one of mass 250kg, collide head on. The car with more mass experiences a(n) __________ force and a(n) __________ acceleration with respect to the the smaller car.

A man shoots a rifle and the force of the shot results in recoil. The magnitude of the force on the rifle __________ the magnitude of force on the bullet, and the magnitude of acceleration of the rile __________ that of the bullet.

A football player, feeling aggressive, is picking on a kid much smaller than himself. The football player asserts: "All of my hours in the weight room prove I can hit you harder than you hit me!" The smaller and more reserved gentleman replies: "Ya of course you can. I'm much weaker than you". Assuming by "hit" they mean "apply a force", are these two correct to think the football player can hit harder? Why?