In the above diagram, the block is at static equilibrium on the ground. What is the value of the force exerted by the ground on the block if the force due to gravity is 12 newtons? A.
20 newtons
B.
12 newtons
C.
-12 newtons
D.
-20 newtons
E.
0 newtons

While goofing off at the ice skating rink, a student takes off her shoes and places each of them on the ice. her friend, a hockey player, then shoots a hockey puck at each shoe. the first puck immediately comes to rest after it collides with the left shoe. the second puck rebounds after it collides with the right shoe. if each hockey puck has the same incoming speed, which shoe has greater speed after the collision? the right shoe. both shoes have the same speed. the left shoe.

Mutt and jeff are running along a path each pushing a cart loaded with rocks. if mutt's wagon has a mass two times greater than jeff's and they want to stay together, arriving at their destination at the same time, what must happen? a) jeff should slow down so mutt can catch up. b) mutt must use half as much force to push his cart. c) mutt must use twice as much force to push his cart. d) mutt and jeff will use the same force, but mutt will take bigger steps.

A17,250 kg rocket is pushed with a thrust of 6,450,284 n. what is the acceleration of the rocket?