Classical Mechanics Answers

For a given body, the moment of inertia is [

Best answer

(A) constant.

(B) independent on the mass.

(C) dependent on the location of the center of

rotation.

(D) dependent on the angular velocity.

A sports car must achieve a velocity of 100m/s after passing the entry tollgate of an expressway. If it can do this after traveling 1km, what must it's acceleration ve?

If a bike is moving with a uniform velocity of 4m/s determine its acceleration after 30 seconds

a student hold her psychology textbook, which has a mask of 1.5kg out of a second-story dormitory until her arm is tired. how much work is done to a book by the student kin simply holding it out of the window?

Big Bob and Little Lulu are stationary. Bob has twice the mass of Lulu. If you push both for the same amount of time with the same force, which of these is true of their momenta (P) and kinetic energies (KE)? Ignore friction (and, hint, think impulse).

a.They have the same KE, but Bob has more P.

b.They have the same P, but Lulu has more KE.

c.Lulu has more P and more KE than Bob.

d.They have the same P and the same KE.

e.Bob has more P and more KE than Lulu.

1. An airplane has a mass of 35,000 kg and a take-off acceleration of 1.20 m/s2. What is the net force accelerating the plane?

2. Let us say that we have a 20-kg load to be pulled by a rope on a horizontal floor. The rope is making an angle of 30 degrees with the horizontal. The tension of the rope is 40 N. If the body starts from rest,

a. find the distance it will move after 5 seconds

b. the velocity after 5 seconds, and

c. the force exerted by the floor on the body 

an object of

weight W can be in a stable state without sliding

down Best Answer ]

a) depends on the size of contact area.

b) depends on weight of the object.

C)

depends on the coefficient of kinetic friction between the

surfaces of the object and the incline.

d) depends on the coefficient of static friction between the

surfaces of the object and the incline

Miss Y agreed to keep a request from her friend to cook rice in an aluminium pot. A metal cover was used on the top of the aluminium pot during cooking, but after a short-while the metal cover was fallen down. They involved in a debate to explain it using a theorem of physics why the metal cover has been fallen down from the top of the aluminium pot. Miss Y said that it was due to produced pressure but her friend agreed on it to some extent and also asked about the conversion of energy, demanding to show the expression for the theorem. Could please help Miss Y?

Miss Y agreed to keep a request from her friend to cook rice in an aluminium pot. A metal cover was used on the top of the aluminium pot during cooking, but after a short-while the metal cover was fallen down. They involved in a debate to explain it using a theorem of physics why the metal cover has been fallen down from the top of the aluminium pot. Miss Y said that it was due to produced pressure but her friend agreed on it to some extent and also asked about the conversion of energy, demanding to show the expression for the theorem. Could please help Miss Y?

One day a teen boy went out of their house and stood beside a pond. He threw a small rock in

the pond relatively far from him and found that a nice wave was coming toward him. He felt a

lovely moment. He threw another similar stone in the pond relatively close to him. He found

that the first wave was disturbed and was not coming to him smoothly. He tried to understand,

‘why did it happen?’ but failed and become unhappy. How will you explain this incidence in

details to the boy to make him so happy? Please mention the principle involved in the incident

and explain different cases of its applications.