# Tag Info

0

Centripetal acceleration = horizontal component of tension Weight = Vertical component of Tension $2$ equations $2$ variables

0

Whoever named the DC brushless obviously didn't care about those who would start their way in the motors/power electronics world. A DC brushless really is a permanent magnets synchronous AC motor fitted with an embedded electronics that takes care of the power conversion DC-AC so that from the outside, it's a blackbox with the behaviour of a brushed DC. ...

1

The rear of the bus normally overhangs the back wheel further than the front of the bus overhangs the front wheel - especially on traditional yellow school buses. When the bus goes over a bump it pivots around the other set of wheels, the distance you move is the ratio of the distance between the wheels and the distance from your back seat to the front ...

-1

$$F = ma$$ $$F = -mg \sin \theta$$ $$ma = -\frac{mgx}{L}$$ $$a = -\frac{gx}{L}$$ Since $-g/L$ is a constant, $a \propto -x$. Hence proved.

0

Ok.. I hope I understood it. Force of gravity is uniformly acting on the rolling body at every point of the body while it is rolling down. Suppose we push a rigid box on a surface then our force is acting on every point of it. The friction force will be opposite of its acceleration. Now for a rolling body it will depend on how we are moving the body. We can ...

0

First of all friction force is applied by the surface of the plane where the object is moving. when we walk on a surface we push the surface backwards as a result due to friction the surface push us which is the frictional force. It is in the direction we are walking. Now an object which is rolling with acceleration is rolling with increasing velocity. It ...

1

This question seems to me harder and more interesting than either of the answers take into account. A) GR has an analogue of Newton's First Law: the geodesics. B) The OP doesn't wish to consider the Universe as a whole. @Jerry is taking the OP in reverse. The OP is: since none of the usual bodies we study is the whole Universe, none of them are closed ...

1

You are missing the fact that the truck is still moving forwards during its decelleration interval.

0

In both cases, the person who jumps has inertia of motion and hence will land in front wrt the earth's reference frame. It is the same effect which makes you jump forward and keep moving for a while when getting down from a slowing bus/train.

Top 50 recent answers are included