Answer:
Mechanical energy = 429.984J
Explanation:
Given the following data;
Mass = 7.2kg
Velocity = 2.4m/s
Height = 5.8m
To find the mechanical energy;
Mechanical energy = kinetic energy + potential energy
First of all, we would determine the values of K.E and G.P.E
K.E = ½mv²
K.E = ½*7.2*2.4²
K.E = 3.6*5.76
K.E = 20.736 J
P.E = mgh
We know that acceleration due to gravity is equal to 9.8m/s²
P.E = 7.2*9.8*5.8
P.E = 409.248
Substituting the values into eqn 1, we have;
Mechanical energy = 20.736 + 409.248
Mechanical energy = 429.984J
Answer:
Frequency of a sound wave remains independent of the medium through which it travels. Wavelength, velocity and phase change with the change in media.
Explanation:
Answer:
379.521 m/s²
Explanation:
r = Radius = 1.5 m
= Angular acceleration = 160 rad/s²
= Angular speed = 14 rad/s
Tangential acceleration is given by
Centripetal accelration is given by
The resultant acceleration is given by
The magnitude of the total acceleration of the top of the racket is 379.521 m/s²
Answer:
The velocity of the skateboard is 0.774 m/s.
Explanation:
Given that,
The spring constant of the spring, k = 3086 N/m
The spring is stretched 18 cm or 0.18 m
Mass of the student, m = 100 kg
Potential energy of the spring,
To find,
The velocity of the car.
Solution,
It is a case of conservation of energy. The total energy of the system remains conserved. So,
v = 0.774 m/s
So, the velocity of the skateboard is 0.774 m/s.