Mechanics | Relativity Answers

if the heat enter to a system is 400 joule , find increase in its internal energy if the work done is 100 joule

A block of mass m sits on a ramp without friction. A force F is exerted to stop it from sliding down.
1) Whats the magnitude of F?
2) At a certain time F is withdrawn and m starts to slide down. What is the acceleration of m? How long does it take for m to reach the bottom of the ramp?
3) What is the velocity and kinetic energy at the bottom of the ramp?
4) After it comes down from the ramp, m starts to slide on the horizontal ground. If the coefficient of friction is Meu, how much further can m move?

A uniform 2.0 kg horizontal beam 50 cm long is
bolted to a brick wall and supports a 5.0 kg lighting
fixture. Calculate the torque produced by the
combined weight of the beam and the light about
the point where the beam meets the wall

what is the different between centripetal acceleration and angular acceleration?

differentiate between centripetal acceleration and angular accelleration

The speed of light in a vacuum is 2.998 × 108 m/s. What is its speed in miles per minute (mi/min)?

A car travel 2m in 2nd second and 6m in next 4 second. what will be distance travel by car in 9th second?

what is the meaning of the product of psistar and psi?

A stone is thrown vertically up and it returns to the thrower 3.2s later.
a) What is the stone's maximum height?
b) What is the initial velocity of the stone when released by the thrower?

The pressure is recorded as 738 mm Hg. Convert this measurement to atm.