Answer:
Net force will be 4.875 N
Explanation:
We have given mass of the cart m = 1.5 kg
Initial velocity of the cart = 0.2 m/sec
And final velocity of the car = - 0.125 m/sec ( Negative direction is due to opposite direction )
Instant of time ![\Delta t=0.1sec](https://tex.z-dn.net/?f=%5CDelta%20t%3D0.1sec)
Change in momentum is given by
![\Delta P=1.5\times (0.2-(-0.125))=1.5\times 0.325=0.4875kgm/sec](https://tex.z-dn.net/?f=%5CDelta%20P%3D1.5%5Ctimes%20%280.2-%28-0.125%29%29%3D1.5%5Ctimes%200.325%3D0.4875kgm%2Fsec)
Now force is given by
![F=\frac{\Delta P}{\Delta t}=\frac{0.4875}{0.1}=4.875N](https://tex.z-dn.net/?f=F%3D%5Cfrac%7B%5CDelta%20P%7D%7B%5CDelta%20t%7D%3D%5Cfrac%7B0.4875%7D%7B0.1%7D%3D4.875N)
Net force will be 4.875 N
The answer is c.
hope this helps! :)
Answer:
a = 9.8 m/s²
Explanation:
Acceleration due to gravity on Earth is constant, which is 9.8 m/s²
Answer:
This difference is kept to a minimum because the resistance in transformers is a few tens of ohms and the resistance of modern voltmeters is of the order of MΩ.
Explanation:
A voltmeter is built by a galvanometer and a resistance in series, this set is connected in parallel to the resistance where the voltage is to be measured, therefore the voltage is divided between the voltmeter and the element to be measured, consequently the measured voltage It is less than the calculated one, since for them the resistance of the voltmeter is assumed infinite.
This difference is kept to a minimum because the resistance in transformers is a few tens of ohms and the resistance of modern voltmeters is of the order of MΩ.