Velocity and acceleration are in the same direction when
Correct answer: A. Velocity of a car is increasing on a straight road
- A. Velocity of a car is increasing on a straight road
- B. Car is turning round a corner
- C. Velocity of a car is decreasing on a straight road
- D. None of these
Explanation
Acceleration is a vector that describes the rate of change of velocity. When a car's velocity is increasing in a straight line, both the velocity and acceleration vectors point in the same direction, indicating positive acceleration. In contrast, if a car is turning, the velocity changes direction while the acceleration points centripetally (towards the center of the curve), and if the car is slowing down, the acceleration is in the opposite direction of the velocity. Therefore, the correct answer is when the car's velocity is increasing on a straight road.
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About Force and Motion
Displacement, velocity and acceleration describe motion, including the horizontal and vertical components of projectile motion. The chapter connects these quantities with Newton's laws, momentum and impulse, then applies conservation of momentum to collisions, distinguishing elastic collisions from inelastic ones.
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