Answer:
7.81 m/s
Explanation:
Given,
initial speed, u = 10.2 m/s
angle of inclination, θ = 40°
time, t = 2.12 s
Horizontal component of the velocity:
In projectile motion horizontal component of the velocity remain same at every point because there is no acceleration.
So, Velocity at the Pinnacle is equal to 7.81 m/s
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Answer:
Explanation:
We know that,
Distance(S)= 100 m
Initial velocity (u)= 15 m/s
Final velocity (v) = 0m/s [As the car stops at last]
We know that,
Substitututing values for v,u,S we get,
The weight is in equilibrium, so the two forces acting on it (tension <em>T</em> pulling upward, and its own weight <em>W</em> pulling it downward) cancel each other. By Newton's second law,
∑ <em>F</em> = <em>T</em> - <em>W</em> = 0
so that
<em>T</em> = <em>W</em>
Calculate the object's weight:
<em>W</em> = (20 kg) (9.8 m/s²) = 196 N
So the tension is <em>T</em> = 196 N as well.