Question

when a bat hits a ball, what is the impulse?
o the force multiplied by the time the objects are in contact
o the change in velocity multiplied by the force
o the mass multiplied by the acceleration
o the mass multiplied by the force

Explanation:

Impulse is defined as the force applied over a period of time. The formula for impulse \(J\) is \(J = F\times\Delta t\), where \(F\) is the force and \(\Delta t\) is the time of contact.

• The option "the change in velocity multiplied by the force" is incorrect as impulse is not related to change in velocity and force in this way.
• The option "the mass multiplied by the acceleration" gives force (\(F = ma\) from Newton's second law), not impulse.
• The option "the mass multiplied by the force" has no physical meaning in the context of impulse.

Answer:

the force multiplied by the time the objects are in contact