Motorcycle safety helmet extends the time of collision and hence decreasing the
Correct answer: B. force acting
- A. chance of collision
- B. force acting
- C. velocity
- D. impulse
Explanation
A motorcycle safety helmet extends the time of collision ∆t when a rider's head hits an object during an accident. By extending the collision time, the helmet increases the duration over which the collision force Facts on the head. According to the impulse-momentum theorem F × ∆t = ∆p increasing the time of collision decreases the force acting on the head.
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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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