A 10.-kilogram object, starting at rest, slides down a frictionless incline with a constant acceleration of 2.0 ms for 40 second

Question

4 years ago

13

s
What is the velocity of the object at the end of the 4.0 seconds?
Select one
a. 16 m/s
b. 20 mis
c. 8.0 m/s
Od 4.0 m/s
Check

1 answer:

Mashutka [201] · Answer 1 · 2022-02-11T06:09:13+03:00

The velocity of the object after 4.0 seconds is 8.0 m/s

Explanation:

The motion of the object is a uniformly accelerated motion (constant acceleration), therefore we can use the following suvat equation:

$v=u+at$

where

v is the final velocity

u is the initial velocity

a is the acceleration

t is the time

For the object in this problem, we have:

u = 0 (it starts from rest)

$a=2.0m/s^2$ is the acceleration

t = 4.0 s is the time elapsed

Solving for v, we find the final velocity:

$v=0+(2.0)(4.0)=8.0 m/s$

Learn more about acceleration:

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