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Physics : Mechanics | Relativity

a sand falls vertically on a venter conveyor belt at a study rate of 400 grams per second. if the belt moves at 10 meters per second. find the force at the belt.

Physics : Mechanics | Relativity

A sphere of diameter D, moving at speed v in air, experiences a quadratic drag force given approximately by FD = (0.25 Ns2/m4) D2 v2, for diameters of few centimetres or more, and speeds of a metre per second or more. Calculate the terminal velocity of a basketball (25 cm diameter, mass 1 kg), and of a grapefruit 10 cm in diameter (assume a density of 1000 kg/m3 for the grapefruit).

Physics : Mechanics | Relativity

a skater moving 5 m/s begins to decelerate at 1 m/s each second. how fast will he/she be moving after 4s?

Physics : Mechanics | Relativity

Which is more elastic rubber or steel?why?

Physics : Mechanics | Relativity

A block weighing 7 N requires a force of 2.7 N to push it along at constant velocity.

What is the coefficient of friction for the surface?

What is the coefficient of friction for the surface?

Physics : Mechanics | Relativity

Why wavelength is short initially in black body when it emits radiation?

Physics : Mechanics | Relativity

The block of material shown below has a shear modulus of 65 GPa. Determine the shear stress and the shear strain induced by the 6 kN shearing force

Physics : Mechanics | Relativity

A motor boat on the river to move from point A from a float on the water outpaces supplies.After 60 minutes the boat changes direction and then again to the board at a distance of 6 km from point A appears.If boats can be assumed to be constant, to find water flow rate

Physics : Mechanics | Relativity

A 10 kilogram shell is fired from a 500 kilogram gun with a velocity of 1000 m/sec. What is the recoil velocity of the gun?

Physics : Mechanics | Relativity

A racing car, moving with constant acceleration along a straight stretch of track, passes a fixed marker A with speed of 72 km/h. Two seconds later it passes a second fixed marker B. Given that the distance AB is 45 meters, find the acceleration of the car.

A third marker C is situated near the end of this section of track. Given that the speed of the car as it passes C is 216 km/h, find the time taken by the car to travel from A to C.

A third marker C is situated near the end of this section of track. Given that the speed of the car as it passes C is 216 km/h, find the time taken by the car to travel from A to C.