Q1. A 12 kg object is at rest. A force of 36 N is applied to it. What is the acceleration of the object? (2021)
Solution:
Using F = ma, a = F/m = 36 N / 12 kg = 3 m/s².
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Q2. If a 4 kg object is moving with a velocity of 5 m/s, what is the momentum of the object? (2020)
Solution:
Momentum = mass × velocity = 4 kg × 5 m/s = 20 kg m/s.
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Q3. A 5 kg object is moving with a constant velocity. What is the net force acting on it? (2022)
Solution:
If the object is moving with constant velocity, the net force acting on it is 0 N according to Newton's first law.
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Q4. An object of mass 8 kg is moving with a velocity of 5 m/s. What is its momentum? (2020)
Solution:
Momentum = Mass × Velocity = 8 kg × 5 m/s = 40 kg·m/s.
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Q5. A block of mass 5 kg is pulled along a horizontal surface with a force of 20 N. If the frictional force acting on the block is 5 N, what is the acceleration of the block? (2021)
Solution:
Net force = Applied force - Frictional force = 20 N - 5 N = 15 N. Using F = ma, a = F/m = 15 N / 5 kg = 3 m/s².
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Q6. A 2 kg object is dropped from a height. What is the force acting on it just before it hits the ground? (2022)
Solution:
The force acting on the object is its weight, F = mg = 2 kg × 9.8 m/s² = 19.6 N.
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Q7. A force of 50 N is applied to a 25 kg object. What is the object's acceleration? (2020)
Solution:
Using F = ma, a = F/m = 50 N / 25 kg = 2 m/s².
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Q8. A 3 kg object is subjected to a net force of 12 N. What is the acceleration of the object? (2022)
Solution:
Using F = ma, a = F/m = 12 N / 3 kg = 4 m/s².
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Q9. A 25 kg object is pulled with a force of 100 N. If the frictional force is 25 N, what is the acceleration of the object? (2023)
Solution:
Net force = 100 N - 25 N = 75 N. Acceleration = Net force / Mass = 75 N / 25 kg = 3 m/s².
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Q10. A block of mass 5 kg is pulled on a horizontal surface with a force of 20 N. If the frictional force acting on the block is 5 N, what is the acceleration of the block? (2021)
Solution:
Net force = Applied force - Frictional force = 20 N - 5 N = 15 N. Acceleration = Net force / Mass = 15 N / 5 kg = 3 m/s².
