An object is launched horizontally from a height of 45 m above the ground with a speed of 10 m/s. The time at which the object will hit the ground is: (Take g = 10 m/s²)

A particle is found to be at rest when observed from a reference frame S1 and the same particle is found to move with a constant velocity when observed from another frame S2. Which of the following s…

A car travels a total distance L. It travels half the distance with speed v1​ and the other half with speed v2​. The average speed of the car is:

A truck starts from rest down a hill with a constant acceleration. It achieves 400 meters in 20 seconds. If the weight of the truck is 7 tons then what will be the force acting on it?

Which of the following is a non-contact force ?

A bus covers the first half of a certain distance with speed v₁ and the second half with a speed v₂. The average speed during the whole journey is :