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A wheel 0.5 m in radius is moving with a speed of 12 m/s. Find its angular speed. -Physics Cbse class 11 1 AnswerAn object of mass m is moving in a circular motion of radius r at a constant speed v. Obtain an expression for the magnitude of acceleration of the object. -Physics CBSE class 111 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 AnswerA slider-crank mechanism with crank radius 60 mm and connecting rod length 240 mm is shown in figure. The crank is rotating with a uniform angular speed of 10 rad/s, counter clockwise. For the given configuration, the speed (in m/s) of the slider is 1 AnswerA vertical rotor planter has 8 cells on each rotor. The rolling radius of the ground wheel is 200 mm. The ratio of rpm of the ground wheel to that of the rotor shaft is 2:3. If the planting is done at a forward speed of 3.5 km h-1, the plant spacing 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 AnswerTwo identical discs of same radius R are rotating about their axes in opposite directions with the same constant angular speed . The discs are in the same horizontal plane. At time t = 0, the points P and Q are facing each other as shown in the figure. The relative speed between the two points P and Q is vr . In one time period (T) of rotation of the discs, vr as a function of time is best represented by - jee main 20121 AnswerThe time taken by a person to cover 150 km was 2(1/2) hours more than the time taken in the return journey. If he returned at a speed of 10 km/hour more than the speed while going, find the speed per hour in each direction. CBSE Mathematics1 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 AnswerWhat is the amount of work done by an electron moving with half the speed of light in empty space free of all forces and for from all matters? Physics Cbse class 11 1 AnswerA motor boat whose speed is 24 km/h in still water takes 1 hour more to go 32 km upstream than to return downstream to the same spot . Find the speed of the stream. CBSE Mathematics1 AnswerA constant retarding force of 50 N is applied to a body of mass 20kg moving initially with a speed of 15m/s.How long does the body take to stop?-Physics Cbse class 111 AnswerAbdul, while driving to school, computes the average speed for his trip to be 20 km h-1. On his return trip along the same route, there is less traffic and the average speed is 30 km h-1. What is the average speed for Abduls trip? - 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 two - wheel drive tractor, while negotiating a terrain, indicates 100% slip of one of the rear wheels. Under such a condition, the use of differential lock causes. GATE- Agricultural Engineering- 20131 AnswerA 100 m sprinter uniformly increases his speed from rest at the rate of ----------Physics CBSE class 11 20161 AnswerDistinguish between speed and velocity. - Physics Cbse class 11 1 Answer Light enters from air to glass having refractive index 1.50. What is the speed of light in the glass? The speed of light in vacuum is 3 × 108 m/s. -CBSE Physics 1 AnswerA 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 AnswerA metallic rod of length ‘A’ is tied to a string of length 2A and made to rotate with angular speed ω on a horizontal table with one end of the string fixed. If there is a vertical magnetic field ‘B’ in the region, the e.m.f. induced across the ends of the rod is : - physics 20131 Answer