The 75-kg man pushes on the 150-kg crate with a horizontal force F. If the coefficients of static and kinetic friction between the crate and the surface are µ, = 0.3 and Mk = 0.2, and the coefficient of static friction between the man's shoes and the surface is µ, is able to move the crate. What is the greatest acceleration the man can give the crate? 0.8, show that the man

71. A man stacks a small block of wood on top of a larger block and then moves both by pushing the bottom block. The large block has a mass of 25 kg, and the smaller block has a mass of 15 kg. The coefficient of static friction between the two blocks is 0.45. How fast can the man accelerate the blocks without having the smaller block slide off the top? (4.2, 4.3) ™AI

what is the answer ?!

A person stands on a scale inside an elevator at rest. The scale reads w= 773 N what is the person's mass? the elevator accelerates upward momentarily at the rate of a =4 m/s ^2 what does the scale read then?  the elevator then moves with a steady speed of 4 m/s what does the scale read now?

A person stands on a scale inside an elevator at rest (see the figure below). The scale reads W 846 N. W a (a) What is the person's mass? 86.268 kg (b) The elevator accelerates upward momentarily at the rate of a = 4 m/s2. What does the scale read then? X N (c) The elevator then moves with a steady speed of 4 m/s. What does the scale read now? Need Help? Read It Watch It

I have a question for elevator problems: Newton's law states that there is always an equal and opposite force. But for elevator problems, if it accelerates upwards... we say that the normal force is greater than the gravitational force. So is Newton's third law still applied here and if so how? Because technically the opposite force is not equal in magnitude for it to be able to accelerate

In the given figure below, both masses m1 and m2 are attached with a string. Mass m1 is moving on its right, and mass m2 is moving downwards. The opposite force of the weight of the mass m2 (hanging mass), acting on m2 is m221 7 m2 O the downward tension on its string O the upward friction O the downward friction O the upward tension on its string.

A book rests on a table. The force of gravity pulls down on the book with a force of 20 newtons. What prevents the book from accelerating downward at 9.8 m/s?? (A The table presses back up on the book with a force greater than 20 newtons. B The table presses back up on the book with an equal and opposite force of 20 newtons. No answer D The table and the book together are accelerating downwards at 9.8 m/s^2. (E The inertia of the book holds it up.

A person on a weight scale in an elevator, moving at a constant speed downward, measures their weight to be 980 N. The elevator then comes to a rest, causing the person to experience an acceleration of 1.20 m/s2 upward. What is the person’s ‘weight’ when the elevator accelerates?

I need help with 4,5,6,7,8