Mechanics | Relativity Answers

a satellite of mass 200 kg is displaced by a distance of 2 Rs gift from a point on the earth surface where R is the radius of the earth calculate the work done on the satellite by the force of gravity take the values of constant is in given your call calculation from instead of physical data given in the course

A ball of mass 100g strikes a wall with the speed 2m/s and the bounces off the wall in the opposite direction with the same speed calculate the impulse of the ball

A certain gasoline weighs 46.5 lb/ft3 . What are its mass density, specific volume and specific gravity?

The specific gravity of ethyl alcohol is 0.79. Calculate its specific weight (in both pounds per cubic foot and kilonewtons per cubic meter) and mass density (in both slugs per cubic foot and kilograms per cubic meter). 

The resonant frequency of a closed air column is known to depend on the pressure and density of the air and length of the air column. How do these quantities relate?

A JNT delivery man is delivering a big box to a client. He is dragging it up a concrete slope leading to the porch, with an angle of 15° to the horizontal. Then he realized that he is on the wrong location so he again dragged the box down the concrete slope. To get the box started up the slope, it is necessary that the man exert six times the force needed to get it started down the slope. If the force is always parallel to the slope, what is the coefficient of static friction between the box and the concrete?

If a trolley of mass 5kg moves at 4.m/s east across a frictionless horizontal surface and a box of mass 1,5 kg is dropped onto the trolley then the trolley and the box continues to move in the same direction.calculate the impulse of the trolley.

A man pulls with a force of 300 N on a rope attached to a

building. The man is positioned 8 m away horizontally and 6

m at the base of the building (vertically) from the point of

attachment, A. What are the horizontal and vertical

components of the force exerted by the rope at point A?

For the velocity potential function, ϕ = x ^ 2 - y ^ 2 find the velocity components at the point (4, 5)

The velocity potential function ϕ is given by ϕ = x2 - y^2. Find the velocity components in x and y direction. Also, show that ϕ represents a possible case of fluid flow.