Question 1 of 5
A sailor jumps in the forward direction, causing the boat to move backward. Which law of Newton does this illustrate?
A
Newton's First Law of Motion
B
Newton's Second Law of Motion
C
Newton's Third Law of Motion
D
Law of Gravitation
Why: This is a classic example of Newton's Third Law of Motion, which states that for every action, there is an equal and opposite reaction. When the sailor jumps forward (action), the boat moves backward (reaction). The forward momentum of the sailor is balanced by the backward momentum of the boat. This demonstrates the principle of action and reaction pairs acting on different objects. Option C (Newton's Third Law of Motion) is the correct answer.
Question 2 of 5
A bus is moving along a straight path and takes a sharp turn to the right side suddenly. In which direction will the passengers sitting on the bus bend?
A
Towards the right side
B
Towards the left side
C
Downwards
D
Upwards
Why: When a bus takes a sharp turn to the right, passengers will bend towards the left side. This occurs due to the combined effect of centripetal and centrifugal forces. The lower portion of passengers closest to the bus tends to move in the direction of the turn (right) due to centripetal force, but the upper portion experiences an outward centrifugal force, causing the body to bend towards the left (opposite to the direction of turn). This is an application of inertia and circular motion principles. Option B (towards the left side) is correct.
Question 3 of 5
An object is moving with uniform velocity. What can be said about its acceleration?
A
Acceleration is constant and positive
B
Acceleration is zero
C
Acceleration is increasing
D
Acceleration is decreasing
Why: When an object moves with uniform velocity, its acceleration is zero. Uniform velocity means the object is moving at a constant speed in a constant direction, with no change in velocity over time. Since acceleration is defined as the rate of change of velocity (a = dv/dt), and there is no change in velocity for uniform motion, the acceleration must be zero. This is consistent with Newton's First Law of Motion, which states that an object in motion will remain in motion at constant velocity unless acted upon by an external force. Option B (acceleration is zero) is the correct answer.
Question 4 of 5
Explain the concepts of distance and displacement with appropriate examples. How do they differ from each other?
Why: Comprehensive explanation covering definitions, differences, examples, and mathematical representations.
Question 5 of 5
Define speed and velocity. Explain how they are related to distance and displacement respectively.
Why: Comprehensive explanation with definitions, relationships, formulas, examples, and key distinctions.
