Mechanics | Relativity Answers

A ball which is thrown vertically from the Earth's surface will reach a maximum height and then falls back to the earth. If air resistance is negligible, the physical quantity which remains constant during the motion of the ball is......

An athlete leaps over a hurdle of height 1.0 m. The athlete leaps at a distance of 2.0 m before the hurdle and lands 2.0 m after the hurdle. If the angle of the leap is at 45 degree with the horizontal line, what is the speed at which the athlete leaps?

TWO FORCES 50 KILO NEWTON AND 10 KILO NEWTON ACT AT A POINT 'O'. THE INCLUDED ANGLE BETWEEN THEM IS 60 DEGREE. FIND THE MAGNITUDE AND DIRECTION OF THE RESULTANT?

A stone is dropped from the top of the tower of height 200m. Simultaneously, another stone is thrown vertically upwards from the foot of the tower with a velocity 50m/s. Find when and where the stones meet.

a body of mass 200g is initially at rest, 2 forces of 1800 dine each do simultaneously the body. if the forces make 120 degree with each other, how far does the body travel in 2 seconds?

A particle moving in a straight line with uniform deceleration has a velocity of 40m/s at a point P, 20m/s at a point Q and comes to rest at a point R where QR=50m. Calculate the distance PQ, calculate the time taken to cover PQ and the time taken to cover PR

a batsman deflect a ball by an angle of 45 degree without changing its initial speed which is equal to 54km/hour mass of a ball is 0.15kg .what is the impulse imparted to the ball

A horizontal force of 600 N pulls two masses 10kg and 20kg lying on a frictionless surface connected by a light string.What is the tension in the string?Does the answer depend on the which mass end the pull is applied?

drive relation between joul and erg?

why is acceleration due to gravity always negative