Need help with the explanation part of this question A group of friends go sliding down a water slide seperately, they sit on a sled and go down the slide.
The decrease in gravitational potential energy of one rider on the slide was7.66kJ, the rider moved through a verticle height of 16.0M with a gravitational field of 9.8 N/Kg

at the bottom of the slide, all the friends and their sleds have approximately the same speed. why? (4 Marks)

Consider a system to be two train cars traveling toward each other. what is the total momentum of the system before the train cars collide?   kg • what must the total momentum of the system be after the train cars collide?   kg •  

From the perspective of an employee that effective channeling of work related information and concerns

You are your friend move a new refrigerator into his kitchen. you apply a horizontal force of 252 n in the negative x direction to try and move the 56 kg refrigerator. the coefficient of static friction is 0.61. (a) how much static frictional force does the floor exert on the refrigerator? give both magnitude (in n) and direction. magnitude n direction (b) what maximum force (in n) do you need to apply before the refrigerator starts to move?