A 1,600 kg car is moving at 10 m/s when the driver stops the car. What is the increase in the thermal energy of the car and its surroundings that results from
applying the brakes to bring the car to a stop? Ignore other sources of thermal
energy.
80,000
8,000
16,000 J
160,000

close lines strong magnet less close weaker

when a device is used in a circuit in which the voltage is 81 v, the current flowing through the device is 3 a. what is the resistance of the device?

a. 27 ω

b. 40.5 a

c. 243 ω

d. 243 a

the correct answer is a. 27

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards