Mechanics | Relativity Answers

In a system, a pulley is attached to a block of mass 5M. Also, the pulley contains a chord on both sides, attached with a block of mass M on one side and with a pulley further attached to a mass 2M on the other side. There is no friction anywhere. Find the initial acceleration of block of mass 5M

If a 25 kg load is applied on Spring A, it elongates 0.25 m, but it elongates 0.30 m after being attached to another Spring B in series. Determine the spring constant of both springs?

A uniform rod of length 20cm is freely pivoted to the center. A gum of mass 0.2kg moving at a speed of 10ms^-1 strikes and sticks to one end of the rod. The rod rotates horizontally. The moment of inertia of the rod and the gum about the pivot is 0.15kgm^2
Calculate angular momentum of gum?
Calculate final angular velocity?
If the length of rod is doubled and moment of inertia is 0.20,calculate the new angular velocity of system.

Fielder ‘F’ threw a cricket ball at a constant speed of 15 m/s and hit the stumps from a distance 30 m. The batsman ‘B’ was 15 m from the stumps and had an initial speed of 6 m/s when ‘F’ threw the ball. If ‘B’ ran with an acceleration of 1.0 m/s2, determine if ‘B’ would be ‘run out’.?

Show a relationship between potential, kinetic and rest energy proving which is normally higher than the rest

Differentiate between kinetic, potential and rest form of energies.

A 50kg box is pushed across a horizontal floor by a horizontal force of 150N through a distance of 12m. Given that the kinetic friction is 0.3.
i)How much work went into overcoming friction?
ii)How much work went into accelerating the box?

An 8.5x10^2 kg elevator is pulled up 32.0m at a constant velocity of 1.4m/s. Calculate the power output of the motor.

Calculate the power of a pump which lifts 500kg of water through a vertical height of 400cm in 5sec (assume g to be 10 m/s).

based on Newton's Law of Gravitation,the force,F,between two points masses,M and m,separate by a distance r is given by

f=g multiply by Mm divided by r square
where Gis the gravttational constant

What is the base unit for F square?