Scenario
A group of students has been testing electromagnets in the lab. They made an electromagnet by
wrapping copper wire around a nail. For one set of tests, they wrapped the wire around the nail 25 times.
For the second set of tests, they wrapped the wire around the nail 50 times. They also have 4 different
batteries: 1.5 V, 3.0 V, 4.5 V, and 6.0 V. They use their electromagnets to see how many paper clips each
can pick up.
Data
For each electromagnet, two trials were conducted at each voltage. The data was recorded in the tables
below.
25-turn Electromagnet
Battery Voltage
Number of Paper Clips Picked Up
Average
First Try
Second Try
1.5 V
3.0 V
4.5 V
6.0 V
NN
50-turn Electromagnet
Number of Paper Clips Picked Up
First Try
Second Try
Battery Voltage
Average
1.5 V
3.0 V
4.5 V
6.0 V

the answer is f1 and d2 because if you put equal force on those two points the beam would balance trust me on this

a 2,000 calorie based diet.

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.

force is based upon mass and acceleration.the statement is not always true.

it can be explained from newton's second law of motion.

as per newton's second law of motion the rate of change of momentum is directly proportional to the applied force and takes place along the direction of force.

mathematically it can be written as -

                                              ⇒      

here   k is the proportionality constant whose value is 1.

                                                            [a is the acceleration=dv/dt]

hence we see that force not only depends on mass and acceleration but also on velocity and rate of change of mass. force f will depend on mass and acceleration only when mass is constant.

hence the statement that force is based upon mass and acceleration is false.