A 3.0-kg block being pulled across a table by a horizontal force of 80 N also experiences a frictional force of 5 N. What is the acceleration of the block

2.  A chain consists of identical links, each with a mass of 2.5 kg. You grab the top link and hold the chain at rest so that it hangs vertically.    a)  Draw a free body diagram of the bottom three links (labeled 1, 2, 3). Label all forces and use double subscript notation to denote which object exerts the force and which object is experiencing the force.   b)  Find the magnitude of the force exerted on link 1 by link 2, in Newtons.   c)  Find the magnitude of the force exerted on link 2 by link 3, in Newtons.

A 75 kg parent and a 22 kg child meet at the center of an ice rink. They place their hands together and push hard enough to slide apart. a. Is the force experienced by the child more than, less than, or the same force experienced by the parent? b. Is the acceleration of the child more than, less than, or the same acceleration as the parent? c. If the acceleration of the child is 2.3 m/s2 in magnitude, what is the magnitude of the force of the parent's push on the child?

Sledding A sled with a mass of 80.0 kg is pulled along flat, snow-covered ground. The static friction coefficient is 0.30, and the kinetic friction coefficient is 0.10. a. What does the sled weigh? b. What force will be needed to start the sled moving? c. What force is needed to keep the sled moving at a constant velocity? d. Once moving, what total force must be applied to the sled to accelerate it at 3.0 m/s??

1. A box with mass m is dragged across a level floor with coefficient of kinetic friction by a rope that is pulled upward at an angle above the horizontal with a force of magnitude F. In terms of the variables given, write an expression for the mass of the box needed so that it moves across the floor at a constant speed.

while tom pushes a 40 kg box in horizontal direction along the classroom floor with a 100 N force, the box is moving in a straight line with constant speed of 0.5 m/s. Ignor air resistance when answering the questions below. a. Write down as much information as you can about the main horizontal forces exerted on the box ( names, directions and if enough information is given, numerical values). b. Write down as much information as you can about the main vertical forces exerted on the box (names, directions, and whenever possible, if enough information is given, numberical values). c. How far did the refrigerator move during those 3 seconds? Explain d. What was the refrigerator's acceleration during that time? Explain