Mechanics | Relativity Answers

1) The angular velocity of a vibrating loaded spring is 20rads^-1. Calculate it's new angular velocity when the force constant is quadrapled

2) A circular circus weighing 6MN moves round with a force of 40KN in a merry-go-round. If it covers an area of 36πm^2, calculate the time taken to make 12 complete revolutions

Particle A has a m and v particle B has a mass of 2m and velocity 1/2v The linear momentum of particle A and particle B are:

the same,

different by a factor of 2,

or different by a factor of 1/2?

A record on a turntable is spinning and coming to rest. Att = 0s the angular velocity of the record is 20.0rad / s with a constant acceleration df - 5.00rad / (s ^ 2) What the record's angular velocity at t = 0.500 s?

At a single-vehicle accident scene, the police measured the length of a 760 kg truck’s skid marks to be 11 m up to a telephone pole, which was struck. They know that the kinetic coefficient of friction for dry pavement is 0.63. How fast was the truck moving when it put on its brakes if it hit the telephone pole going 0.8 m/s?

An object floats on water if the buoyancy force of the water on the object is equal to the object’s weight. I.e. the buoyancy force makes things float. The buoyancy force on a ship that sits on the top of the water is 15,000 N. What is the mass of the ship?

An air balloon accelerates upward at a rate of 1.1 m/s ^2 . If the flames produce an upward force of 2300 N, what is the mass of the air balloon?

A stunt driver gives her car 3600 N to take a jump that has an angle of inclination of 31°. If she and the car together weigh 4700 N, what is the acceleration of the car? (Assume no friction.)

An object fall from rest at a height h Determine the potential energy of an object as a function of t

A car 4m long moving at a velocity of 25ms/1 was beside a lorry 20m long with a velocity of 19m/s. The distance between them is 10m. How long will it take the car to overtake the lorry.

With the value of the angle α

how are the 2 cubes

the same direction can lie

balance as shown. The coefficient of friction between the block and the value is

μ, between blocks is considered very small.