Translation
A 100kg roller coaster reaches the first hill at 2m / s. the height of the first hill is 20 meters. *Find the total energy* Question added
Answer:
19820 J
Explanation:
Total energy is the sum of kinetic and potential energy
Potential energy is given by mgh
Kinetic energy is given by
The combination will then be and substituting m for 100 Kg and 2 m/s for v then taking g as 9.81 while h is given as 20 m we obtain energy as
K= (1/2) m v^2
so 0.5*0.145*<span>1281.64=92.92J of KE</span>
Answer:
519.62 m/s
Explanation:
Applying,
v = √(T/m').............. Equation 1
Where v = velocity of the wave, T = Tension on the string, m' = mass per unit length of the string
From the question,
Given: T = 1350 N, m' = 0.005 kg/m
Substitute these values into equation 1
v = √(1350/0.005)
v = √(270000)
v = 519.62 m/s
Answer:
Centripetal force,
Explanation:
It is given that,
Mass of the ball, m = 62 g = 0.062 kg
Length of the string, l = 72 cm = 0.72 m
Angle,
To find,
The centripetal force experienced by the ball.
Solution,
According to the attached free body diagram,
T = 0.716 N
The centripetal force will be experienced by the ball in horizontal direction. It is equal to :
So, the centripetal force experienced by the ball is 0.379 N.