G. A 4.0 kg pendulum ball is moving at 5.0m/s at the lowest point. i) What is th
ID: 1620908 • Letter: G
Question
G. A 4.0 kg pendulum ball is moving at 5.0m/s at the lowest point. i) What is the kinetic energy at the lowest point? ii) How high does the ball swing? H. A container with a mass of 1200 kg displaces a volume of 4.0 m^3 when it is completely submerged in water. i. What is the buoyant force on the container? ii. Will the block float or sink? Explain how you determined this A 4.0 kg ball moving at 5.0 m/s to the right collides with a 6.0 kg ball moving at 10m/s to the left. The balls stick together after the collision. a) What is the total momentum before the collision? c) What is their velocity after the collision? A hydraulic lift has a small piston with area of 2.0m^2 and a large piston with area of 40m^2. lf you push down on the small piston with a force of 50 N what force would push up on the large piston?Explanation / Answer
here,
G)
mass ,m = 4 kg
speed at lowest point , v = 5 m/s
a)
the kinetic energy at the lowest point , KE = 0.5 * m* v^2
KE = 0.5 * 4 * 5^2 J
KE = 50 J
b)
let the height of ball be h
using conservation of energy
KE = m * g * h
50 = 4 * 9.81 * h
h = 1.27 m
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