Speed in specified direction is called ………………
A) displacement
B) velocity
C) acceleration
D) momentum
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The rate of change of motion in a specified direction is
Answer: Velocity
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A man travels two-third part of his total distance with speed `v_(1)` and rest one-third part with speed `v_(2)`. Find out the average speed of the ma
Correct Answer - `(3v_(1)v_(2))/(v_(2)+2v_(1))
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A 150 m long train is moving in north direction with a velocity of 5m/s and a parrot is also moving in north direction with a velocity of 10 m/s, then
Correct Answer - (i)`30sec (ii) 300m
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The first factory Act in 1881 specified the rules for the welfare of
(C) the children
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The ratio of speed of light in first medium to speed of light in second medium is called …………………..
B) refractive index of 2nd medium with respect to 1st medium
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Electrons in the conductor move with a constant average speed. This speed is called …………………
C) either A or B
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A conductor of 1 m length is moving with a speed of 10 m/s in the direction perpendicular to the direction of magnetic field of induction 0.8T.
Correct option is D) 8 V
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If the speed of an object decreases, the direction of velocity and acceleration are in …………….. direction.
Correct option is A) same
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A car covers half the distance at a speed of 60 kmh^(-1) and the other half at a speed of 40 km h^(-1) The average speed of the car is
Correct option is B) 50 km h-1
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An aeroplane takes 1 hour less for a journey of 1200 km if its speed is increased by 100 km/hr from its usual speed. Find its usual speed.
Let usual speed of aeroplane be x km/hr. Given, distance =1200 km Time taken for journey of 1200 km `=(1200)/(x) "hours"" "(because "Time"="Distance"/"Speed")` When the speed is increased by 100...
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