Laws of Motion
Physics ⇒ Mechanics
Laws of Motion starts at 8 and continues till grade 12.
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See sample questions for grade 11
A 1 kg ball is dropped from rest. What is the force acting on it due to gravity? (Take g = 9.8 m/s²)
A 10 kg box is pulled with a force of 50 N on a horizontal surface. If the frictional force is 20 N, what is the acceleration of the box?
A 2 kg object is moving in a circle of radius 4 m at a constant speed of 3 m/s. What is the magnitude of the centripetal force acting on it?
A 5 kg object is acted upon by a net force of 20 N. What is its acceleration?
A 50 kg person stands on a weighing scale in an elevator accelerating upward at 2 m/s². What is the reading on the scale? (Take g = 9.8 m/s²)
A block of mass 2 kg is sliding on a frictionless surface with a velocity of 3 m/s. What is the net force acting on it?
A force of 15 N is applied to a 3 kg object. What is its acceleration?
A force of 30 N is applied to a 6 kg object at rest. What will be its velocity after 2 seconds?
Define inertia.
Describe the effect of increasing the angle of inclination on the component of gravitational force parallel to an inclined plane.
Describe the role of friction in walking.
Explain the difference between static and kinetic friction.
Explain why a person feels lighter in a descending elevator.
If the mass of an object is doubled while the force applied remains the same, what happens to its acceleration?
State Newton's First Law of Motion.
State Newton's Second Law of Motion.
A 1 kg block is placed on a rough horizontal surface. The block is pulled by a force of 10 N at an angle of 60° above the horizontal. If the coefficient of kinetic friction is 0.4, calculate the acceleration of the block. (Take g = 9.8 m/s2)
A 1 kg block is placed on a rough surface. The coefficient of kinetic friction is 0.5. If a force of 8 N is applied horizontally, what is the acceleration of the block? (Take g = 9.8 m/s2)
A 1 kg block is placed on a rough surface. The coefficient of static friction is 0.4. What is the maximum force that can be applied horizontally before the block starts to move? (Take g = 9.8 m/s2)
A 1 kg object is moving in a circle of radius 2 m with a speed of 4 m/s. What is the magnitude of the net force acting on the object?
