Physics Answers

A ball is projected vertically upward from the top of a tower 60m high with a velocity if 30ms.what is the maximum height above the ground level? How long does it take to reach the ground

A piece of stone attached to one end of spring is whirled round in a horizontal circle of radius 7m .when the constant speed of the stone is 40ms-1 calculate the centripetal acceleration

A ball is thrown vertically upward from ground level hits the ground after 4s.calculate the maximum height it reached during it's journey

A person kicks a ball with an initial velocity 15m/s at an angle 37° above the horizontal (neglect

the air resistance). Find:

a. the total time the ball is in the air.

b. the horizontal distance traveled by the ball.

A train starts from rest from a station and travel with uniform acceleration 0.5ms for 20s.it travel with uniform velocity for another 50s,the brakes are then applied so that a uniform retardation is attained and the train comes to rest in a further 10s.sketch the velocity time graph of the motion. using your graph. calculate the total distance travelled by the train

a proton moving along the x axis has an initial velocity of 4.0x 10^6 m/s and a constant acceleration of 6.0x10^12 m/s^2. what is the velocity of the proton after it has traveled a distance of 80 cm?

An aircraft shell is fired vertically ward with a muzzle velocity at 100ms.calculate

a=the maximum height it can obtain

b=the time taken to teach the height

c=the instantaneous velocities at the end of 20sec and 50sec

What type of energy stored batteries hold energy in

If you have a sample size larger than 100, and a mean with a known standard deviation of the population(s), you would use ____ to test for significance.

8.0 kg stone at the end of a steel wire (Y = 2.0×1011) is being whirled in a horizontal circle

at a constant tangential speed of 12 m/s. The wire is 4.0 m long and has a radius of 1.0 × 10-3m.

Determine the strain in the wire.