Physics Answers

Write down energy of vibration.

Explain energy of rotation.

a uniform rod AB of length a and weight w is freely hinged to a vertical wall at A and is maintained in equlibrium by a light string of lenght a fastened to B and to a point C at a distance b vertically above A. prove reaction at hinge WSqrt(a²-2b²)/2b and find tension in the string

A ship keel plate is 5.25m x 1.85m. Determine the maximum force on the plate when the ship is in fresh water at draught (height) of 6.14m.

It is the representation of electric field

A Christmas ball in a shape of a hollow sphere is hung from the tree by a piece of thread attached to the surface of the ball. The mass and radius of the ball are 0.105kg and 0.12m, respectively. What will be its period of oscillation when slightly displaced from its equilibrium position? (Hint: I =5 3 𝑚𝑟 2 )

Let’s say I have two rocks, one with a mass of 22g and the other of 17.6g. The rock with the mass of 22g is dropped into a bowl of flour from a height of 0.178m, and the rock with the mass of 17.6g is dropped from a height of 0.279m. Out of the two, which one will create a bigger impact crater in the flour? In other words, which has the greater effect on the depth of the impact crater: a larger rock, or a smaller rock dropped from a greater height?

A truck and a trailer weigh 4000 kg EACH. In order to accelerate at 2 m/s2, how much force would need to be produced?

A shot fired with velocity u at elevation theta hits a mark at a distance R in the same horizontal plane. If there is no air resistance, show that (u²/g)f(theta).

If 660 joules of work was done by a battery in moving 110 coulombs of charge through a lamp, what was the voltage across the lamp?