# Recent content by inky

1. ### Minimum speed at the circular track

Thanks a lot. Why didn't consider the force at the top?
2. ### Minimum speed at the circular track

Homework Statement What is the minimum speed of the car must have at the top of the loop? There are three methods. I would like to know which method or answer is correct. Please see attached file. Homework Equations Please see attached file. The Attempt at a Solution Please...
3. ### Conservation momentum for y- axis

No. We could not use Law of conservation of momentum for falling objects because of the external force acting on it. I don't want the answer. I want correct method.
4. ### Conservation momentum for y- axis

Please see examiner report.Pls. see attachment.
5. ### Conservation momentum for y- axis

If the time duration of the collision was nonzero, the collision force would have to be specified as a function of time. If it was a nice constant force you could work out the motion during the collision beginning with an F = ma formula for each mass. Looks complicated. The answer would not...
6. ### Conservation momentum for y- axis

Homework Statement A ball P of mass m kg is dropped from a point A, which is 2 m vertically above a point B on a horizontal floor. After P hits the floor at B, it rebounds and hits another ball Q, of the same mass, which has also been dropped from A. The impact between the two balls is...
7. ### Two bodies attracting via gravitation

When I calculate the problems for collision, e=(speed of separation)/(speed of approach) If two bodies are moving opposite directions, relative velocity is v1+v2. If two bodies are moving same direction, relative velocity is v2-v1. After collision two bodies need to separate. It...
8. ### F = m x a, but what if velocity is constant (making a zero)?

I think before collision speed of truck is constant but after collision speed is not constant. So it has acceleration. Now we can consider force.
9. ### (M1 x 1)+(M2 x2) / M1+M2

You took the wrong value. We don't know xb and yb We know centre of mass where is it. x(bar) (or) xc=2, y(bar) or yc=5.5 Use xc=(m1x1+m2x2)/(m1+m2) . You can find x2. yc formular is similar as xc. You can find y2.
10. ### Simple coefficient of friction problem

Read the problem again. Constant speed!!! Equilibrium condition!!

12. ### Velocity of a particle when acceleration based on displacement

Where is the problem?
13. ### Help with inclined plane

Draw the diagram for initial and final position for the object. Use law of conservation of energy at the top and distace d from the bottom.
14. ### Revolutions and angular speeds

You forgot to do square for v0. So calculate again.
15. ### Torque problem

Wow!!Take the axis at point P is very easy to calculate. Thanks .