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anyanavicka [17]
3 years ago
9

A 0.20 kg baseball is traveling at 40 m/s toward the batter. The ball is hit by the bat with a force of 200N, and is

Physics
1 answer:
Paraphin [41]3 years ago
8 0

Answer:

Time, t = 0.015 seconds.

Explanation:

Given the following data;

Mass, m = 0.2kg

Force, F = 200N

Initial velocity, u = 40m/s

Final velocity, v = 25m/s

To find the time;

Ft = m(v - u)

Time, t = m(v - u)/f

Substituting into the equation, we have;

Time, t = 0.2(25 - 40)/200

Time, t = 0.2(-15)/200

Time, t = 3/200

Time, t = 0.015 seconds.

Note: We ignored the negative sign because time can't be negative.

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Answer:

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In the exercise they indicate the angular velocity w = 1 rev/min, let's reduce to the SI system

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3 years ago
A shopper does 157 J of work pushing a cart with 10.9 N force
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The cart travelled a distance of 14.4 m

Explanation:

The work done by a force when pushing an object is given by:

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W = 157 J is the work done on the cart

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d=\frac{W}{F cos \theta}=\frac{157}{(10.9)(cos 0)}=14.4 m

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