Recent content by Masafi

And why doesn't it hit the target? Why is there a tangential acting velocity?

Well, why does the magnitude of the velocity, i.e. the speed, remain constant? Why doesn't it accelerate closer towards the Earth? If something has a force, say a person dragging something, why does that go towards the person, whilst in a circular motion, it spins around?

Hi, I understand how centripetal force works and all. But I still don't understand, when looking at a satellite orbiting the Earth, the only force acting is its weight, which is in the direction of the Earth. How does its circular motion start in the first place? If the only force there is is...

Yeah, so at t=0, I = 12V/16ohms = 0.75A But the answer uses 1.6V, which I am not sure where they get from... "I = 1.6 V / 16 = 100 mA shown on axis " Shouldn't it be 12V since it says: "The capacitor is charged to 12 V again and then discharged through a 16ohms resistor" The time...

It is an uniform electric field, but the forces are not collinear... Why is this?

I know what it is, but I don't get how you apply it here. The direction of current is known (+ to -) , but force and the direction in which B field applied is not given? How does this relate to the previous arragement? What I can think is using the direction of B field to be from N to S pole...

So equipotential lines are the same as the uniform electric field lines?

I have attached the question, and the answer. I don't understand the answer given.

In a test laboratory, a car is crashed into a concrete wall and comes to rest. There is no damage to the wall. Explain of how the principle of conservation of momentum applies to this situation. Answer: The Earth plus car recoils with same momentum as the car had Why "the Earth" and not...

Suggest a reason why it is difficult to measure a large current (2000 amps) with a conventional meter in series in the circuit. The answer is: Even a very small resistance (in series) with 2000 A through it would generate much heat Why is this? How do we get this conclusion? From R=V/I...

The centripetal acceleration of a person standing at the equator is about 0.03 m s–2. (Radius of the Earth = 6.4 × 106 m.) The size of the force R provides a measure of the apparent strength of the gravitational field. Show that the apparent field strength g at the equator differs from...

In a uniform electric field, where 2 plates are placed horizontally and are parallel, the electric field is vertical.. What about the equipotential lines? Are they horizontal?Also, I need to draw a graph of how the Force on an electron varies with the distance from the bottom plate, and this is...

How do u know that it goes clockwise? So the pd on the capacitor is always against the pd of the battery? Why is that?

So a current is induced upwards, and that goes anti clockwise?

Thanks. 4. Was a typo by me sorry. So why does the left plate become positive? Is it because the corresponding left side of cell (the line to the right of the resistor) is positive? 5. Oh ok. Why is that the build up of Q or V reduces flow? I = Q/t, so if Q increases, I increases?