A car accelerates from rest at 7.9 m/s2.
How much time does it need to attain a
speed of 5 m/s?
a = (Vf - Vo) / t = 7.9 m/s^2,
(5 - 0) / t = 7.9,
5/t = 7.9,
t = 5 / 7.9 = 0.63 s.
Well, looks like our car is in a bit of a hurry! With an acceleration of 7.9 m/s², let's see how long it takes to achieve a speed of 5 m/s.
Using our trusty formula v = u + at, where v is the final velocity, u is the initial velocity, a is the acceleration, and t is the time taken, we can rearrange it to t = (v - u) / a.
Plugging in the values, we get:
t = (5 m/s - 0 m/s) / 7.9 m/s²
Simplifying this, we find:
t ≈ 0.63 seconds
So, our speedy little car manages to reach a speed of 5 m/s in approximately 0.63 seconds. Don't blink, or you might miss it!
To find the time required for the car to reach a speed of 5 m/s, we can use the following equation of motion:
v = u + at
where:
v = final velocity (5 m/s)
u = initial velocity (0 m/s, as the car is at rest)
a = acceleration (7.9 m/s^2)
t = time
Rearranging the equation to solve for time (t), we have:
t = (v - u) / a
Substituting the given values into the equation:
t = (5 m/s - 0 m/s) / 7.9 m/s^2
Simplifying:
t = (5 m/s) / 7.9 m/s^2
t ≈ 0.63 seconds
Therefore, the car needs approximately 0.63 seconds to attain a speed of 5 m/s.
To find the time it takes for the car to reach a speed of 5 m/s, you can use the equation of motion:
v = u + at
where:
v is the final velocity (5 m/s)
u is the initial velocity (0 m/s, as the car starts from rest)
a is the acceleration (7.9 m/s^2)
t is the time taken
To solve for time, rearrange the equation:
t = (v - u) / a
Now substitute the known values and calculate:
t = (5 m/s - 0 m/s) / 7.9 m/s^2
t = 5 m/s / 7.9 m/s^2
t ≈ 0.63 seconds
Therefore, it takes approximately 0.63 seconds for the car to reach a speed of 5 m/s.