Question

A golf ball starts with a speed of 2 m/s and slows at a constant rate of 0.5 m/s2, what is its velocity after 2 s?​

Answer 1

Answer:

v = u + at

v = 2 + (-0.50)(2)

v = 2 - 1

= 1 m/s

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Answer 2

Given:

• Initial velocity,u = 2 m/s

• Acceleration, a = -0.5 m/s²

• Time taken, t = 2 s

To be calculated:

Calculate the velocity of moving body?

Formula used:

V = u + at

Solution:

★ According to the first equation of motion,we have :

v = u + at

☆Substituting the value in the above formula,we get

v = 2 + (- 0.5 ) × 2

v = 2 +( -5/10) × 2

v = 2 + ( -5/5 )

v = 2 - 1

v = 1 m/s

Thus, velocity moving golf ball is 1 m/s .

Extra information:

Three equation of motion:

• v = u + at

• s = ut + 1/2 at²

• v² = u² + 2as