Choose the incorrect alternative:
1. Newton's first law is the law of inertia.
2. Newton's first law states that if the net force on a system is zero, the acceleration of any particle of the system is not zero.
3. Action and reaction act simultaneously.
4. The area under the force-time graph is equal to the change in momentum.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIf two forces () and () N are acting on a body of mass 2 kg, then the acceleration produced in the body in will be:
1. ()
2. ()
3. ()
4. ()
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA body of mass 5 kg
is acted upon by two perpendicular forces, 8 N and 6 N. The magnitude of the acceleration of the body is:
1. 0.99 ms-2
2. 3 ms-2
3. 2 ms-2
4. 0.77 ms-2
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe force 'F' acting on a particle of mass 'm' is indicated by the force-time graph shown below. The change in momentum of the particle over the time interval from 0 to 8 s is :
1. 24 Ns
2. 20 Ns
3. 12Ns
4. 6 Ns
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyOn the application of an impulsive force, a sphere of mass \(500\) g starts moving with an acceleration of \(10\) m/s2. The force acts on it for \(0.5\) s. The gain in the momentum of the sphere will be:
1. \(2.5\) kg-m/s
2. \(5\) kg-m/s
3. \(0.05\) kg-m/s
4. \(25\) kg-m/s
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyTwo masses, and are experiencing the same force where < . The ratio
of their acceleration is:
1. 1
2. less than 1
3. greater than 1
4. all the three cases
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyAn impulse of 6m is applied to a body of mass m moving with velocity . The final velocity of the body will be:
1.
2.
3.
4.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA 100 kg gun fires a ball of 1 kg horizontally from a cliff at a height of 500 m. It falls on the ground at a distance of 400 m from the bottom of the cliff. The recoil velocity of the gun is (g = 10 m/s)
1. 0.2 m/s
2. 0.4 m/s
3. 0.6 m/s
4. 0.8 m/s
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyAn object of mass 3 kg is at rest. Now if a force of is applied to the object, then the velocity of the object at t = 3 second will be :
1.
2.
3.
4.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA rigid ball of mass M strikes a rigid wall at and gets reflected without loss of speed, as shown in the figure. The value of the impulse imparted by the wall on the ball will be:
1. Mv
2. 2Mv
3. Mv/2
4. Mv/3
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology