Physics Answers

A car is proceeding down a 1 in 10 incline at 65kph when it’s brakes are abruptly applied. How far does it skid along the road before stopping is the wheels lock and the coefficient of friction between the tires and the road is 0.7?

A 60g bullet is fired at a target that presents an average resistive force to the passage of the bullet of 20kN per metre thickness of the material from which is constructed. If the bullet strikes the target at 600ms^-1, what does the minimum thickness of the target have to be to stop the passage of the bullet completely?

Calculate the capacitance of a capacitor with separation distance of 800m with an area 1.25kmsquare.The permittivity of free space is 8.892*10^-13

A French mortar fires a projectile at an angle of 45° to horizontal with a muzzle velocity of 200m/s. A tank is advancing direct towards the mortar on a level ground at a speed of 10m/s. What should be the distance from the mortar to the tank at the instant thr mortar is fired in order to score a direct hit?

A projectile is fired with a horizontal velocity of 330m/s of a higher cliffof height 100(H)

(i) How long will it take to strike the level ground at the base of the cliff?

(ii) How far from the foot of the cliff will it strike the ground?

(iii) With what velocity will it strike the ground?

(iv) At what angle will it strike the ground?

Calculate the capacitance of a capacitor with separation distance of 800m with an area 1.25kmsquare.The permittivity of free space is 8.892*10^-13

A brass cube of side 10cm is heated through 30C.If the linear expansivity of brass is 2.0*10^-5K^-1 what is the increase in its volume

A metal rod of length 40.0 cm at 20°C is heated through a temperature of 45°C if the new length of the rod

is 40.05 cm calculate its linear expansivity

A metal rod of length 40.0cm at 20C is heated through a temperature of 45C.if the new length of the rod is 40.05cm calculate its linear expansivity