A particle is moving in a circle of diameter 5m. Calculate the distance covered when it competes 3 revolutions. (b) (i) Define average speed. (ii) An object travels 30m in 4s and then another 30m in 2s. What is the average speed of the object? (c) Amit is moving in his car with a velocity of 45km/h. How much distance will he cover (i) in one minute and (ii) in one second.​ STEP BY STEP PLSS

r=rho l/a where a is the area, l is the length and rho is resistivity so the greater the area the lesser the resistance thats why the earth pin is thicker bcos current follow the shortest path, so less resistive .

note: the given question is incomplete.

complete question is given below.

which is an example of kinetic energy?

a. the energy stored in ethanol  

b. a hockey puck sliding across the ice  

c. a compressed spring  

d. a ball sitting at the top of a ramp

solution: the kinetic energy is the energy posses by the virtue of the motion of the object.

in the given options, a, c and d are the example of potential energy because it is the energy posses by the virtue of the rest of the object. but option b has the kinetic energy as the object is in motion.

hence, a hockey puck sliding across the ice   is the apex example of kinetic energy.

so, the option (b) a hockey puck sliding across the ice   is the correct option.