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The maximum and minimum magnitudes of the resultant of two forces are 17 newton and 7 newton respectively, if these two forces are acting at right angle to each other, then the value of resultant of these forces in newton will be :

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Important Questions on Force and Laws of Motion

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A person of weight W jumps to ground with his legs fixed and comes to rest with an upward acceleration of 3 g. (g is acceleration due to gravity). The force exerted by him during landing is: 
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A cork is immersed in a jar of water and released. How the cork will move if the jar is assumed to be kept in a satellite orbiting earth: 
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A packet of weight W was allowed to fall freely in a water tank with acceleration a<g. The magnitude of resistive force offered by water is :
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A horizontal force F is applied to keep the block stationary on a frictionless inclined plane. Find the angle of incline, for which the applied force is equal to the weight of body: 

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A wooden plank of length L rests on a frictionless floor. A boy of mass M now runs over the plank starting from its one end. If one wooden plank is M5, the distance covered by the boy relative to the ground will be:
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A body is said to be under balanced forces when the resultant force applied on that body is _______

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Neglecting rotation of the earth, if suddenly the attractive power of the earth drops to zero, a man standing on the earth will 
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Is any force required to keep a body moving in a circular path?
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In a tug of war, when the two teams are pulling the rope, a stage comes when the rope does not move to either side at all. What can you say about the magnitudes and directions of the forces being applied to the rope by the two teams at this stage?
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Balanced forces _____.
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Forces applied on an object in the same direction?
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What is the usual name of the forces which cannot produce motion in a body but only change its shape?
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What do you understand by the term 'balanced force'? Give two examples from your surroundings.
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In a tug of war, two teams are pulling the rope such that the ribbon of the rope is not moving. What is the magnitude of the resultant force on the rope? Explain.

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Explain why a bicycle stops if we stop pedalling.
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If the two forces act in the opposite directions on an object, the net force acting on it is?
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In which of the following cases is the net force NOT zero?
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A person is holding a briefcase. Draw the force acting on the briefcase when the briefcase is at rest.

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Distinguish between balanced forces and unbalanced forces.

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Draw the distance-time graph for an object in motion as per data given in the following table.

Time (s) 0 1 2 3 4 5 6
Distance (m) 0 3 11 30 68 100 240

What do you infer about the forces acting on the object?