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Why is a pendulum with a bob of the same size but larger mass than another bob damped more lightly?

The heavier bob has more kinetic energy/potential energy/momentum for any given amplitude of the two pendulums due to its larger mass, as each of these three quantities depend linearly on mass. The damping i...
LS
Answered by Lucy S. • Physics tutor
11950 Views

How does conservation of momentum work when at least one of the bodies in the problem changes mass?

The principle to use here is the principle of conservation of linear momentum, the question asks whether we have to modify this principle or use it in a different way to solve physics problems that have a bo...
HC
Answered by Helen C. • Physics tutor
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Where does the formula for gravitational potential come from? Why the minus sign?

We know Newton's Law of Gravitation , which states that the force F between two bodies of masses M and m respectively, separated by distance R, can be given by: F = GMm/R 2 where G is the gravitational const...
KM
Answered by Kieren M. • Physics tutor
9474 Views

Compare and contrast elastic and inelastic collisions

An elastic collision is a collision where there is no loss of kinetic energy. Therefore, it can be said that, since KE is conserved, momentum is conserved. In other words the momentum and total kinetic energ...
MR
Answered by Matt R. • Physics tutor
16399 Views

A projectile is launched from ground level with a speed of 25 m/s at an angle of 42° to the horizontal. What is the horizontal distance from the starting point of the projectile when it hits the ground?

Resolve the vertical velocity of the projectile (25sin42) and use v=u+at where v=-25sin42m/s, u=25sin42m/s, a=-9.8m/s/s to find t. t= (50sin42)/9.8= 3.41sResolve horizontal velocity (25cos42) and multiply by...
JW
Answered by Joe W. • Physics tutor
18555 Views