The escape velocity of a body on an imaginary planet which is thrice the radius of the earth are double the mass of the earth (Ve is the escape velocity from the earth)
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The moment of inertia of a uniform circular disc of radius R and mass M about an axis touching the disc at its diameter and normal to the disc
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(a) 1/2 MR² […]
Two solid discs of radii r and 2r roll from the top of an inclined plane without slipping. Then
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(a) The bigger disc will reach the horizontal level first (b) The smaller […]
A body covers 200 cm in the first 2 seconds and 220 cm in the next 4 seconds. The velocity of the body at the end of the 7th second is
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(a) 10 […]
The coefficient of friction between the tyres and the road is 0.25. The maximum speed with which a car can be driven round a curve of radius 40 m without skidding is (assume g=10 ms⁻²) […]
If two bodies are projected at 30⁰ and 60⁰ respectively with the same velocity, then
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(a) Their ranges are same (b) Their heights are same (c) Their times of flight are same […]
At which place, Earth’s magnetism becomes horizontal
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(a) Magnetic pole (b) Geographical pole (c) Magnetic meridian (d) Magnetic equator
Correct Answer:
Magnetic equator
Explanation:
No explanation available. Be the first to write […]
A charged particle with a velocity 2×10³ ms⁻¹ passes undeflected through electric field and magnetic fields in mutually perpendicular directions. The magnetic field is 1.5T. The magnitude of electric field will be
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A 0.5 kg ball moving with a speed of 12 m/s strikes a hard wall at an angle of 30° with the wall. It is reflected with the same speed at the same angle. If […]
A marble block of mass 2 kg lying on ice when given a velocity of 6 m/s is stopped by friction in 10 sec. Then the coefficient of friction is
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(a) 0.01 (b) […]
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