Between the top of the first and the top of the second loop, the coaster has lost potential energy = mgh, where h = 22.2 - 15 = 7.2m
This energy would have converted to Kinetic. Write out an equation and the masses will cancel out. Does that hint help you to find the solution? If not, I will give you another hint.
Answer:
Simple machines are useful because they reduce effort or extend the ability of people to perform tasks beyond their normal capabilities. Simple machines that are widely used include the wheel and axle, pulley, inclined plane, screw, wedge and lever.
Answer:
Energy is stored in the bonds between atoms
Answer: The acelaration is 2 m/s^2
Explanation: Using the second Newton law
The total force acting over the object is equal to the mass x accelaration, that is:
We considerer the applied force to the object equal to 25N
and the friction force of 15 N
25N-15N= m*a
Answer:
65.625 m/s
Explanation:
c = Speed of light = 3×10⁸ m/s
Relative speed
Relative speed = 35.625 m/s
Velocity of speeder = Velocity of police car + Relative speed
⇒Velocity of speeder = 30 + 35.625 = 65.625 m/s
∴ Velocity of speeder is 65.625 m/s
