Top answers

find and symplify the following. Integrate ( 2x^5 - 1/(4x^3)- 5 )dx

first the second term can be split up to make integrating it easierits easier if the x 3 component is separatedthis eventually simplifies the second term to (-1/4) * x -3 so now the question is integrate (2x...
JL
Answered by Jacob L. • Physics tutor
2092 Views

a ball is dropped from rest off a cliff of height 50m, determine the final velocity of the ball assuming no air resistance.

Consider the appropriate equation of motion to solve this (use SUVAT method). The equation v^2=u^2+2 a s is appropriate to solve. Substituting in the knowns gives v=+sqrt(2 9.81 50)=31.32 which, quoted to th...
CJ
Answered by Cameron J. • Physics tutor
3143 Views

Asteroid of mass 10^16 kg is travelling in the equatorial plane of Earth. It hits the surface at 45°. After the impact the day shortens by 1% (15 mins). How fast was the asteroid - comment? Neglect effects of atmosphere. Consider only inelastic collision.

Key idea - total angular momentum of the system is conserved. Before the collision: angular momentum of earth is given by L E =I w E , here w E is the angular velocity of Earth and I is its moment of innerti...
JK
Answered by Jiri K. • Physics tutor
2612 Views

If a vehicle A, 1000kg moving at 5m/s collides with vehicle B, 750kg, moving in the opposite direction at 8m/s assuming no rebound what is the velocity of the vehicles after collision.

for this question we must consider the conservation of momentum law which states that the total momentum in a system before a collision must equal the total momentum in a system after a collision where momen...
LD
Answered by Lucinda D. • Physics tutor
2091 Views

A sigma0 particle with mass 1193 MeV/c^2 decays into a lambda0 particle with mass 1116 MeV/c^2 a photon. Find the energy and momentum of the photon, assuming that the kinetic energy of the lambda0 particle is negligible.

This is a standard A-level particle physics question. To solve it, we need to use three equations given in the formula sheet of the paper. To find the energy of the photon, we use Einsteins famous energy-mas...
PF
Answered by Peter F. • Physics tutor
2822 Views