NEED HELP AS SOON AS POSSIBLE, I JUST HAVE A FEW MINUTES LEFT!!! The diagram shows a cathode-ray oscilloscope (c. r.o.) being used to measure the rate of rotation of a flywheel. The flywheel has a small magnet M mounted on it. Each time the magnet passes the coil, a voltage pulse is generated, which is passed to the c. r.o. The display of the c. r.o. is 10 cm wide. The flywheel is rotating at a rate of about 3000 revolutions per minute. Which time-base setting will display clearly separate pulses on the screen? A 1 s cm -1 B 10 ms cm -1 C 100µs cm -1 D 1µs cm -1

c because the action was the roller coaster reaches bottom of hill (action) reaction would be blood tends to drain away from head

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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.

could you add the photo?

explanation: