Q. 13.9( 10 Votes )
You are driving a motorcycle on a horizontal road. It is moving with a uniform velocity. Is it possible to accelerate the motorcycle
without putting higher petrol input rate into the engine?
Yes, we can accelerate the motorcycle without putting higher petrol input rate into the engine, as acceleration means change
in velocity per time. Thus, we can infer that one can even change acceleration by changing its direction by maintaining its magnitude constant since we know that acceleration is a vector quantity. So, by maintaining the petrol input rate constant if the motorcycle moving in a circular path is given a turn along the arc of circular path, it will have an acceleration towards the center of the circular path, called as Centripetal acceleration.
Rate this question :
The displacement vector of a particle of mass m is given by r (t) = î A cos ωt + ĵ B sin ωt.
(a) Show that the trajectory is an ellipse.
(b) Show that F = −mω2r
Physics - Exemplar
A racing car travels on a track (without banking) ABCDEFA (Fig. 5.10). ABC is a circular arc of radius 2 R. CD and FA are straight paths of length R and DEF is a circular arc of radius R = 100 m. The co-efficient of friction on the road is μ = 0.1. The maximum speed of the car is 50 m s-1. Find the minimum time for completing one round.
Physics - Exemplar
A motorcycle is going on an over bridge of radius R. The driver maintains a constant speed. As the motorcycle is ascending on the over bridge, the normal force on itHC Verma - Concepts of Physics Part 1
Why are mountain roads generally made winding upwards rather than going straight up?Physics - Exemplar
A simple pendulum having a bob of mass m is suspended from the ceiling of a car used in a stunt film shooting. The car moves up along an inclined cliff at a speed υ and makes a jump to leave the cliff and lands at some distance, Let R be the maximum height of the car from the top of the cliff. The tension in the string when the car is in air isHC Verma - Concepts of Physics Part 1
The center of a wheel rolling on a plane surface moves with a speed A particle on the rim of the wheel at the same level as the center will be moving at speedHC Verma - Concepts of Physics Part 1
A body is rotating non-uniformly about a vertical axis fixed in an inertial frame. The resultant force on a particle of the body not on the axis isHC Verma - Concepts of Physics Part 1
Figure (10-Q3) shows a small wheel fixed coaxially on a bigger one of double the radius. The system rotates about the common axis. The strings supporting A and B do not slip on the wheels. If x and y be the distances travelled by A and B in the same time interval, then
HC Verma - Concepts of Physics Part 1
A body is in pure rotation, The linear speed υ of a particle, the distance r of the particle from the axis and the angular velocity ω of the body are related as ThusHC Verma - Concepts of Physics Part 1