Toughest push and it’s didushehsuuahsydusuays
Neutron stars have been overtaken by GRAVITY ;)
False
Explanation:
The Unit of Frequency is Hertz (Hz)
Frequency in layman’s language can be said as a number of times a particular event repeat itself in unit time.
E.g. Supposing a hypothetical situation in which a boy cracks 5 nuts every minute, then his frequency can be said to be 5 nuts /min
However, in physical dimensions, the frequency is always calculated in terms of a second (as a measure of unit time).
Hence the Standard unit (SI)of Frequency is named after German origin physicist Heinrich Hertz. In simple terms, 1 Hertz denotes the event repeats itself one time per second and in physics domain one cycle per second.
The answer is -15.625m/s².
Acceleration is the change in velocity over a period of time. It can be computed using the formula:
Where:
vf = final velocity
vi = initial velocity
t = time
Now let's see what was given in your problem:
The car was moving at 25m/s and then came to a stop. So initially it was moving and then it stopped. This means the final velocity will be 0m/s because it stopped moving.
But look at the problem, it shows no time. We need to solve for time from the time it moved till it reached the red light 20 m away.
Time can be computed using the kinematics formula:
We just derive the formula from the equation by filling out what we know first.
The time it took from the point it was moving till it stopped is 1.6s. We can now use this in our acceleration formula.
Notice that the acceleration is negative. This means that the car decelerated or slowed down.