Answer:
Explanation:
initial velocity(u) = 4 m/s
final velocity(v) = 13 m/s
acceleration(a) = 2m/s^2
time(t) = ?
v = u + at
13 = 4 + 2 × t
13 = 4 + 2t
2t = 13 - 4
2t = 9
t = 9/2
t = 4.5s
hope this helps
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Many carb up before running as its important to have sugars fuel you for a day of perspiring and harsh exercise. Without eating you would run out of energy much quicker and be unable to preform with the same amount of energy you would have with fuel.
Yes, it is already happening. About 270 million years ago the continents collided to form Pangea, and now, after the continents separated they continue to drift apart. Attached is a picture of what it may all look like when they recollide. Scientist are still not really sure.
The force is -12,000 N
Explanation:
First of all, we calculate the acceleration of the ball, by using the following suvat equation:
where:
v = 0 is the final velocity of the baseball (it comes to rest)
u = 40 m/s is the initial velocity
a is the acceleration
s = 2.0 cm = 0.02 m is the displacement of the ball
Solving for a,
Now we can calculate the average force exerted on the ball, by using Newton's second law:
where
m = 300 g = 0.3 kg is the mass of the ball
is the acceleration
Substituting,
where the negative sign indicates that the direction of the force is opposite to the direction of motion of the ball.
Learn more about forces:
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