Answer:
option C
Explanation:
The correct answer is option C
When the driver takes the sharp right turn the door will exert rightward pressure on the driver.
When the driver takes the sudden right turn the tendency of the body is to be in the straight line by the vehicle moves in the circular path so, as the vehicle turns it applies a rightward force on you.
The pushing of the door to you because of the centripetal force acting on the car due to sudden sharp turn.
For questions like this there are only a couple of possible equations you need to look at :)
In this case the equation for Kinetic energy (energy of motion) is:
![K_{E} = (0.5*m) * v^2](https://tex.z-dn.net/?f=K_%7BE%7D%20%3D%20%280.5%2Am%29%20%2A%20v%5E2)
Simply plug in the mass and velocity variable given in the question and you have your answer :)
It will take a total of 15 minutes i believe. t = d/r
t = 5mi/20mph = .25hr
60 min = 1 hr
.25*60 min = 15 minutes it wil take him
Answer:
Explanation:
2 )
power of an electric device = V² / R where V is volts and R is resistance
putting given data
power = 9²/ 5
= 16.2 J/s
energy produced in 7 minutes
= 16.2 x 7 x 60
= 6804J .
3 ) Power of an electrical device
= V² / R
= V X I where I is current
= 4.5 x .5
= 2.25 W or J/s
4 )
energy used in 3 minutes with power of 2.25 W
= 2.25 x 3 x 60
= 405 J .
7 )
power of a electrical device
= V x I
IR x I where R is resistance .
= I²R
putting given data
power = .005² x 50
= 1.25 x 10⁻³ W .
8 )
Energy used up by a 60 W bulb in 2.5 hours
= 60 x 2.5 x 60 x 60
= 5.4 x 10⁵ J .