Ms. Newton's class was conducting experiments on forces and friction. The students set up the ramp seen here. They measured the force needed to pull a wood block up the wooden ramp. That was their control or standard of comparison. They used a force of 65 Newtons to pull the block to the top
of the name. Student groups took tums changing the surface of the ramp on the left beginning with carpet. Will there be more or less friction than the
wood tamo? Predict how the friction force will change on each of the trial surfaces Drag each surface to one of the two columns

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.

it is given that trillions of microbes make up to 1% to 3% of the body mass.

let's take average of this percentage: 2%

consider the average mass of the human body as 70 kg.

then, trillions of microbes would have mass  

therefore, 100 trillion micro-organisms would weigh:

this is an approximate value and could change depending on the mass of the human body and percentage of the microbes present in it.

average mass per microorganism =

amplitude

hope this