Answer: m = 5 kg
Explanation: To solve for the mass of the object we will use the formula of Potential energy
PE = mgh. Derive for mass, so the formula will be
m= PE / gh
m = 147 J / 9.8 m/s² ( 3 m )
= 5 kg
Answer:
Velocity = 0.105m/s
Explanation:
Using conservation of momentum:
Momentum before impact= mass of ball × velocity of ball
= 0.400×10.8= 4.32
Momentum after impart= mass of ball × velocity of ball + mass of olaf × velocity of olaf
= 4.35 +3.56 + 74.9Vf
Vf=7.88_74.9 = o.0.105m/s
D is the correct answer. Constructive Interference occurs when the crests of one wave overlaps with the crests of another wave. The reason it is called "constructive" is because one wave is adding energy to another wave. Hope this helps!
