Mechanics | Relativity Answers

Two stones are projected from the top of a tower in opposite directions with the same velocity V at angles 30°,60° to the horizontal. What is the relative velocity of one stone with respect to other stone?

Prove that c2=a2+b2- 2abcosy is equal to a= bcosy+√c2- b2×sin2y

When traveling a highway in the mountains, you may see elevation signs that read “914m (3000 ft).” Critics of the metric system claim that such numbers show the metric system is more complicated. How would you alter such signs to be more consistent with a switch to the metric system?

A car is moving down a street at 55 km/h. A child suddenly runs into the street. If it takes the driver 0.75s to react and apply the brakes, how many meters will the car have moved before it begins to slow down?

Calculate the force exerted on a car of mass 1 ton, that moved with velocity of 45km/hr on a rough road and it is brought to rest after 10 seconds

an object that can slide easily on a frozen pond is given an initial speed of 50.0m/s. the if the object always remains on the icy surface and slides 190m before coming to the rest, determine the coefficient friction between the object of the ice

A woman of weight 300N wants ro carry a load weight at 150N to the top of hill 30m high. to reach the hill top, she walk along a path of 450m. How much work has she done to carry herself and the load to the hill.

the distance s along z axis varies with time as a s = 2t 3 +3z 2 +8. find the time t after which acceleration becomes zero

Suppose you throw basketball upward. Is it true or wrong to say that “you have not increased the internal energy of the air within the basketball”? Either yes or no explain it with a solid reason

There is a uniform electrostatic field in a region. The potential at various points on a small sphere centred at P, in the region, is found to vary between the limits 589.0V to 589.8V. What is the potential at a point on the sphere whose radius vector makes an angle of 600 with the direction of the field ?
(1)589.5V(2)589.2V(3)589.4V(4)589.6V