This is question of gravity

This is question of gravity

A Student moves a box of books with a rope by pulling the rope with a force of 90 N at an angle of 30°. The books have a mass of 20 kg and a coefficient of friction between the box...

An astronaut has a mass of 80 kg, but on an unknown planet, the bathroom scale reads 15 kg when the astronaut stands on it. What is the astronaut's weight and the gravitational field strength on the...

A man stands before a train. We noticed that after 2 seconds the first wagon has passed. How many seconds are needed for the 16th wagon to pass? The speed is constant

Their apparent weight is zero. They are above the earth’s atmosphere. The gravity of the earth and the sun are directed opposite each other, so there is no net gravitational force. They...

microbiology: hi, my question is if we grow microbial culture in a liquid media in a cylindrical bottle of 100 ml capacity, with 40 ml inoculated liquid media and then capped, and this was set...

A cart full of packages weighing 180 pounds is rolling down a ramp 12 feet long at an incline of 25° (the force applied by gravity is equal to the weight of the package). Find the work done by gravity...

Always store heavier items in lower shelves

When lifting any items from floor, always bend your back and don’t bend your knees?

Gravitational force question

You throw a ball from 2 meters up in the air at a velocity of 16 m/s. How long will it take for the ball to hit the ground?Grav

Mars has a mass of 6.4 × 1023 kg. It has a moon named Phobos with a mass of 1.07 × 1016 kg. a. If their centers are 9400 km apart, what is the force of gravity acting on Phobos? b...

physics

Please help solve!

if the relation W=(F+X)/y, where W & F and force and x and y are unknown,is dimensionally correct then find the dimensions of x

I was thinking about gravity and isn't it a meters per second per second per second acceleratory force? I mean, as you get close to an object's center of mass the force of gravity gets stronger,...

How long will it take a ball to fall 81 feet

A planet has ? the density of earth but 2x the radius. find the surface gravitational force on this planet. (Hint: Earth’s is 10N/Kg)

Jupiter has a mass of 1.90 x 1027 kg. the semi-major axis of its orbit is 7.78 x 1011. Th radius of the planet is 7.14 x 107 m. Io, one of jupiter's moons, orbits at a distance...

A ramp is inclined at 12 degrees to the horizontal. A cart is pulled 8m up the ramp by a force of 120N, at an angle of 10 degrees to the surface of the ramp. Determine the mechanical work done against...