A car accelerates on a horizontal road due to the force exerted by
(a) the engine of the car
(b) the driver of the car
(c) the earth
(d) the road.
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An automobile engine propels a 1000 kg car (A) along a levelled road at a speed of 36 km h–1
m(A)= m(B) =1000 kg. v = 36 km/h =10 m/s Frictional force = 100 N Since, the car A moves with a uniform speed, it means that the...
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When a horse pulls a cart, the force that helps the horse to move forward is the force exerted by (a) the cart on the horse
(b) the ground on the horse Explanation: The horse pushes the ground in the backward direction and, in turn, the ground pushes the horse in the forward direction, according to Newton’s third...
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A car accelerates on a horizontal road due to the force exerted by (a) the engine of the car
(d) the road. Explanation: The car pushes the ground in the backward direction and according to the third law of motion, reaction force of the ground in the forward direction acts on...
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The contact force exerted by a body A on another body B is equal to the normal force
(b) the force of friction between the bodies is zero (d) the bodies may be rough but they don't slip on each other. Explanation: Contact force F is the resultant of normal force...
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A force vector F= vector v x vector A is exerted on a particle in addition to the force of gravity,
Since we need equilibrium, \(v\times A+mg=0\) Given that, \(\vec F=\vec u\times \vec A \) and \(\vec mg\) act on the particle. Velocity must be in direction perpendicular to plane in which gravity acts. Thus, \(v \times A=Av\,sin\theta,\,\theta\) is the angle...
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A simple pendulum fixed in a car has a time period of 4 seconds when the car is moving uniformly on a horizontal road
From where does the 2Π√l/g^2+a• come from ?
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A simple pendulum fixed in a car has a time period of 4 seconds when the car is moving uniformly on a horizontal road
1 Answers
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A spring-mass system oacmates hi a car. it the car accelerates on a horizontal road,
(c) remain same EXPLANATION: The frequency of a spring-mass system depends only on the mass and the spring constant, none of which changes in the accelerating car. So the frequency remains the...
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A car is running on a road at a uniform speed of 60 km/h. The net resultant force on the car is :
(d) By Newton's second law F = ma. If a = 0, Fnet = 0 Thus, the resultant force is zero.
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In five minutes distance between a pole and a car changes progressively. What is true about the car ? (A) Car is at rest (B) Car is in motion
(B) Car is in motion
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