Determine the force the sun exerts on an object with a mass of 80.0 kg if that object is on the earth. What is the force exerted by the moon on the same object? What is the force the earth exerts on it?

What does the slope of the graph of friction force versus normal force represent?

Johnny pulls a box of mass 20 kg with a force of 25 N at an angle of 35o with the horizontal.  ( use  g =9.81 m/s2)   1. ignoring friction, what is the acceleration of the box?      2. What is the weight of the box?      3.  What is the normal force exerted on the box by the ground?

A scaffold suspended from a building by two ropes one painters on it. The painter has a force of 400N going down and the scaffold has a force of 120 N going down as well. The left rope holding up the scaffold has a force of 320N up. If the forces going up are balanced (Force net =0) with the forces going down- How much force is on the other rope?______newtons.

Consider applying Newton's law to a man riding an elevator (perhaps calculating his acceleration).   Which of the following forces must be considered? Choose all that apply. 1.) The force that the man's feet exert on the floor of the elevator. 2.) The force of gravity on the elevator. 3.) The force of the elevator cable exerts on the elevator car. 4.) The force that the elevator floor exerts on the man's feet. 5.) The force of gravity on the man. 6.) The force that the man's head exerts on his neck.

1. Here's our force diagram from Part 1:     In this drawing, we've rotated the coordinate axes so the x-axis is parallel with the ramp surface and the y-axis is perpendicular. Now most of the forces are aligned with the axes, except one. Which force is not aligned with the new axes?   Hint: Note: our textbook would label F_{string}Fstring​ as either F_TFT​ or just TT for the tension force.   F_gFg​ , the force of earth's gravity on the object, also known as the weight w of the object.   F_NFN​, the normal force (sometimes labeled n ) on the object by the ramp surface.   F_TFT​, the tension force on the cart by the string

A 48 kilogram crate is sliding down a ramp with an incline of 21 degrees to the horizontal. The coefficient of friction is .46 between the create and ramp.   what is the Parallel component of the weight force? What is the acceleration of the crate sliding down the ramp? draw a picture

10. Imagine you are pushing a car: a. If you kept the force you exerted the same, but doubled the mass of the car, would the acceleration you achieve be twice as much or half as much or the same? b. If you pushed the original car twice as hard, would the acceleration you achieve be twice as much or half as much or the same as when you pushed it with your original force? 11. Predict where this balloon will go by drawing an arrow that represent the direction of its acceleration I