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At t = 0 seconds, a cart is moving with a velocity of 10 cm/s and an acceleration of 4.0 (cm/s)/s. Assuming its acceleration stays at this value, what will its velocity be 7.0 seconds later?

Respuesta :

carlosego
For this case what you should do is write the kinematic equations to find the final speed.
 We have then:
 a = a
 vf = a * t + vo
 Where,
 vf: final speed
 a: acceleration
 t: time
 vo: initial speed.
 Substituting the values we have:
 vf = (4.0) * (7.0) + (10)
 vf = 38 cm / s
 answer:
 its velocity will be 38 cm / s 7.0 seconds later

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