Related InterviewSolutions

• Calculate the force required to impart a car a velocity of `30m//s`, in 10 seconds. The mass of the car is `1500kg`
• A force of `5N` gives a mass `m_(1)`, an acceleration of `8 m//s^(2)`, and a mass `m_(2)`, an acceleration of `24 m//s^(2)`. What acceleration would it give if both the masses are tied together?
• Which would require a greater force - accelerating a 10 g mass at 5 m/ `s^(2)` or 20 g mass at 2 m/`s^(2)`?
• A hammer of mass `500g`, moving at `50m//s`, strikes a nail. The nail stops the hammer in a very short time of `0.01 s`. What is the force of the nail on the hammer?
• A truck starts from rest and rolls down a hill with a constant acceleration. It travels a distance of `400m` in `20 s`. Find its acceleration. Find the force acting on it if its mass is `7` metric tonnes (Hint.1 metric tonne=1000kg)
• A stone of 1 kg is thrown with a velocity of `20ms^(-1)` across the frozen surface of a lake and comes to rest after travelling a distance of 50 m. What is the force of friction between the stone and the ice ?
• Two objects of masses `100g` and `200g` are moving along the same line in the same direction with velocities of `2m//s` and `1m//s`, respectively. They collide and after the collison, the first object moves at a velocity of `1.67 m//s` in the same direction. Determine the velocity of the second object.
• In the following example,try to identify the number of times the velocity of the ball changes: "A football player kicks a football to another player of his team who kicks the football towards the goal. The goalkeeper of the opposite team collects the football and kicks it towards a player of his own team"? Also identify the agent supplying the force in each case.
• A water tanker filled up to two-thirds of its tank with water is running with a uniform speed. When the brakes are suddenly applied, the water in its tank would:A. move backwardB. move forwardC. rise upwardsD. remain unaffected
• A passenger in a moving train tosses a coin which falls behind him. It means that motion of the train isA. acceleratedB. uniformC. retardedD. along circular track