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A train is travelling at a speed of 90 km h-1. Brakes are applied so as to produce a uniform acceleration of -0.5 m s-2. Find how far the train will go before it is brought to rest.- Physics Cbse class 11 1 Answer A train travels a distance of 300 km at a uniform speed. If the speed of the train is increased by 5km an hour, the journey would have taken two hours less. Find the original speed of the train. CBSE Mathematics1 AnswerA train starting from a railway station and moving with uniform acceleration attains a speed 40 km h-1 in 10 minutes. Find its acceleration. - Physics Cbse class 11 1 Answer Which of the two cars travelled farther after the brakes were applied? - Physics Cbse class 11 0 AnswerA bus starting from rest moves with a uniform acceleration of 0.1 m s-2 for 2 minutes. - Physics Cbse class 11 1 Answer A train 125 m long passes a man, running at 5 km/hr in the same direction in which the train is going, in 10 seconds. The speed of the train is:1 AnswerIt takes 10 s and 15 s, respectively, for two trains travelling at different constant speeds to completely pass a telegraph post. The length of the first train is 120 m and that of the second train is 150 m. The magnitude of the difference in the spe1 AnswerWhen will you say a body is in (i) uniform acceleration? (ii) non-uniform acceleration? - Physics Cbse class 11 1 AnswerDefine uniform circular motion. Derive expression for centripetal acceleration. What is the direction of centripetal acceleration. Express it in terms of angular speed. Physics Cbse class 11 1 AnswerA bus decreases its speed from 80 km h-1 to 60 km h-1 in 5 s. Find the acceleration of the bus. - Physics Cbse class 11 1 AnswerDetermine the maximum acceleration of the train in which a box lying on its floor will remain stationary, given that the coefficient of the stati c friction between the box and the trains floor is 0.15. -Physics CBSE class 11 20161 AnswerA 100 m sprinter uniformly increases his speed from rest at the rate of ----------Physics CBSE class 11 20160 AnswerA truck starts from rest and rolls down a hill with a constant acceleration. It travels a distance of 400 m in 20 s. Find its acceleration. Find the force acting on it if its mass is 7 tonnes (Hint: 1 tonne = 1000 kg). - Physics Cbse class 11 0 AnswerThe length of the bridge, which a train 130 metres long and travelling at 45 km/hr can cross in 30 seconds, is:1 AnswerThe length of the bridge which a train 130 metres long and travelling at 45km/hr can cross in 30 seconds is 11 AnswerWhy do you fall in the forward direction when a moving bus brakes to a stop and fall backwards when it accelerates from rest? - Physics Cbse class 11 1 AnswerA racing car has a uniform acceleration of 4 m s-2 . What distance will it cover in 10 s after start? - Physics Cbse class 11 1 AnswerFind the instantaneous acceleration of a 1.0 kg mass suspended from a spring constant of force constant 5.0 N/cm, when the spring is stretched 10.0 cm. The mass is initially at rest. -Physics CBSE class 11 20160 AnswerWhich of the following has more inertia: (a) a rubber ball and a stone of the same size? (b) a bicycle and a train? (c) a five-rupee coin and a one-rupee coin? - Physics Cbse class 11 1 AnswerA stone of 1 kg is thrown with a velocity of 20 m s-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? - Physics Cbse class 11 1 Answer