B. the length of the spring. If a force of 3N is hung on it; assuming Hooke's law is obeye TAKE HOME ASSIGNMENT
State Hooke's law of elasticity,
Sketch the graph of stress/extension against strain/load and locate the:
a. Proportionality limit
b. Elastic limit
c. Yield point
d. Breaking point
e. Elastic region
f. Plastic region. (Use A4 paper or Cardboard sheet)
3.
A spiral spring has a length of 14cm when a force of 4N is hung on it. A force of ON
extends the spring by 4cm. Calculate the:
a. unstretched length of the spring;
A

frequency or wavelenth of em radiation in a vacuum

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.