Question

With what speed would an athlete need to release a shot an angle of 33 degree to horizontal to achieve a shot put throw of 30 m?

Select one:

a. 17.9 m/s

b. 30.2 m/s

c. 37.2 m/s

d. 23.2 m/s

Answer #1

This is a projectile motion.

The range of projectile is given by the equation,

where v is the velocity

g is the acceleration due to gravity and

h is the height.

The height is given as,
where v_{0} is the initial velocity.

Here, the shot put is at rest, hence v_{0} = 0.

Therefore, height h = 0

Then,

Rearranging for v, we get,

Now, substituting the values 30 m for d, 9.8 for g and 33 for

We get,

**= 17.9 m/s**

The answer is **a) 17.9 m/s**

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