science
Grade-11
Easy
Question
Friction can be reduced by
- using wheels
- using ball- bearings
- both (a) and (b)
- By grooves
The correct answer is: both (a) and (b)
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A boy pushes a wooden plank (mass 50 kg) with a constant force of 105 N. A constant frictional force of 40 N is present. Determine the resultant force?
A boy pushes a wooden plank (mass 50 kg) with a constant force of 105 N. A constant frictional force of 40 N is present. Determine the resultant force?
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The gravitational pull of the Earth on a body is called its _________
The gravitational pull of the Earth on a body is called its _________
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The tires of vehicles also wear out gradually due to _________ with the road.
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Roy has a toy Auto of mass 3 kg. How much force should he apply on the auto so that it should travel with the acceleration of 10 m/s2?
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Choose the correct free body diagram
Choose the correct free body diagram
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The characteristics of frictional force is/are
The characteristics of frictional force is/are
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F = Gm1m2/r2
F = Gm1m2/r2
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An oil container filled up to 2/3 of its height is moving at a uniform speed. On sudden application of the brake, the oil in the container would
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A student is sitting on a chair. One force that is acting on the student is the pull of gravity. According to Newton’s third law, there must be another force acting, which is:
A student is sitting on a chair. One force that is acting on the student is the pull of gravity. According to Newton’s third law, there must be another force acting, which is:
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The force acts between the two surfaces which are in contact
The force acts between the two surfaces which are in contact
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When we apply pressure on a rubber balloon kept between our hands, what is the reason it changes its shape?
When we apply pressure on a rubber balloon kept between our hands, what is the reason it changes its shape?
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The speed of a falling body normally ________.
The speed of a falling body normally ________.
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Which of the following is not the effect of force?
Which of the following is not the effect of force?
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The universal gravitational constant can be represented by,
The universal gravitational constant can be represented by,
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The direction in which the object is pushed or pulled is called
The direction in which the object is pushed or pulled is called
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