What are the effects if force is acting on a moving body in a direction perpendicular to the direction of motion?
The speed changes uniformly
The acceleration changes uniformly
The direction of motion changes
All of these
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When force is applied on a moving body in a direction perpendicular to the direction of motion, then it takes a circular path. Thus the direction of motion changes without changes in the speed.
On a banked road, which force is essential to provide the necessary centripetal force to a car to take a turn while driving at the optimum speed?
Component of normal reaction
Component of frictional force
Both (a) & (b)
None of these
Optimum speed is given by on a banked road, the normal reaction's component is enough to provide the necessary centripetal force to a car driven at optimum speed.
A cyclist taking turn bends inwards while a car passenger taking the same turn is thrown outwards. The reason is.
car is heavier than cycle
car has four wheels while cycle has only two
difference in the speed of the two
cyclist must counteract the centrifugal force while in case of car only the passenger is thrown by this force
A car takes a circular turn with a uniform speed . If the reaction at inner and outer wheels be denoted by and , then
Due to centrifugal force, the inner wheel will be left up when car is taking a circular turn. Due to this, the reaction on outer wheel is more than that on inner wheel.
A cyclist bends while taking turn in order to
reduce friction
provide required centripetal force
reduce apparent weight
reduce speed
The cyclist bends while taking turn in order to provide necessary centripetal force.
Clearly form the figure, and contribute to the centripetal force.
A car moves at a speed of on a banked track and describes an arc of a circle of radius . The angle of banking is
Angle of banking is
Maximum speed of car for safe turning on horizontal road is
The minimum velocity (in ) with which a car driver must traverse a flat curve of radius and coefficient of friction 0.6 to avoid skidding is
60
30
15
25
For negotiating a circular curve on a levelled road, the maximum velocity of the car is
Here
The coefficient of friction between the rubber tyres and the road way is 0.25 . The maximum speed with which a car can be driven round a curve of radius without skidding is
or
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