A ball is kicked from the top of a building with a velocity of 50 m/s and lands 165 m away from the base of the building.
1 answer:
Answer:
3.1 s
Explanation:
we can assume that this motion has a horizontal projectile motion.
projectile motion happens when an object is subjected to only gravity. Gravity acts to influence the vertical motion of the projectile, it makes a vertical acceleration.
The horizontal motion of the projectile is the result of the constant velocity of the object.We assume no acceleration in the horizontal direction.
applying motion equations
where
s - distance
u - initial velocity
a-acceleration
t - time
s = ut + (1/2)at²
→ 165 = 50t + 0 (as no acceleration is in horizontal direction)
t = 3.1 s
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Answer:
F = 132N
Explanation:
Let the pulling force be F
Given the mass of the barrel is 12 Kg and The acceleration is 1.2 m/
We know that Net Force =
Now net force = F - mg
F - mg = ma
F = mg + ma
F = m(a+g) =
Note that there will be a downward force acting on the body which is equal to mg