Mechanics | Relativity Answers

If the fuel consumption of a car, travelling at a steady 60 mph, is 20 mpg what is the power produced by the petrol being burnt in the engine? [Assume that the density of petrol is 0.84 kg/l and the heat of combustion of petrol is 47 302 kJ/kg]

An object of mass 0.5 kg is thrown vertically upward with a speed of 4 m/s.
i) Calculate the kinetic energy of the object.
ii) What is the maximum potential energy that the object will possess?
iii) Hens,calculate the maximum height reached by the object?

A spaceship moving with an initial velocity of 58.0 meters/second experiences a uniform acceleration and attains a final velocity of 153 meters/second. What distance has the spaceship covered after 12.0 seconds?

Two balls are released simultaneously from a certain height, one is allowed to fall freely from a certain height, one is allowed to fall freely and other thrown with some horizontal velocity. Which one will hit the ground earlier and why?

horses are to race over a certain english meadows for a distance of 4.0 furlongs. what is the race distance in [a] rods and [b] chains? [ 1 furlong = 201.168 m. 1 rod = 5.0292 m and 1 chain = 20.117 m]

A carrom board (4ft each side) has the queen at the centre .The queen,hit by the striker moves to the front
edge,rebounds and goes in the hole behind the striking line .find the magnitude of displacement of the queen (a)from the centre to the front edge ,(b)from the front edge to the hole,(c)from the centre to the hole?

A prankster drops a water balloon off the top of a 1,024-ft.-high building.When will the balloon hit the ground?
Round your answer to one decimal place.
The balloon hits the ground after___ seconds.

A farmer moves along the boundary of a square field of side 10m in 40 seconds. What will be the magnitude of displacement of the farmer at the end of 2 minutes 20 seconds from his initial position?

An object is dropped from a platform 400 ft high. Ignoring wind resistance, how long will it take to reach the ground?

A stone falls from a tower, height 100m.At same time another stone through with 4.5m\s velocity.when they meet and which height.