When a wheel 1m in diameter, makes 30 revolutions per minute, the linear speed of a point on its rim in m/sec is:
Correct answer: B. π /2
- A. π
- B. π /2
- C. 130 π
- D. 60 π
Explanation
The explanation is given below: The linear speed (v) of a point on the rim of a wheel can be calculated using the formula: v=2 πrf This formula expresses the relationship between linear speed, radius, and the frequency of rotation (or revolutions per second) of the wheel. The factor 2π comes from the conversion between angular measure (radians) and linear distance.
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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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