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A 200 N net force acts on a 50 kg box. What is the acceleration of the box?
what is photon
a)If the work function foe a metal is 1.85 ev, what would be the stopping potential for light having a wavelength of 410 nm? b) what would be the maximum speed of the emitted photoelectrons at the metals surface?
Can the moment of force in a rotational motion be calculated by using both of these formulas: m.g.R(1-costheta) or m.g.R.theta
- Show that the rate of change of the total angular momentum of a system of particles is equal to the resultant torque exerted by all external forces which act on the system.
- A particle of mass m moves according to x = x0 + at2, y = bt3, and z = ct. Verify that
dLdt=r×F=τ
what is second law of motion and how it is related to gravity
Calculate energy required to pump atmospheric air in a cube of 10*10*10 so that it weight 10 kg more that the initial without change in volume
When a thin foil is bombarded with a particles, a few of them are scattered back toward the source. Rutherford concluded from this that the positive charge of the atom—and also most of its mass—must be concentrated in a very small “nucleus” within the atom. What was his line of reasoning?
A pile drive hammer of mass 200kg falls freely through a distance of 8.2m to strike a pile of pass 800kg and drives it 105mm into the ground. The hammer does not rebound when driving the pile.
Determine the average resistance of the ground using the principle of conservation of energy.
