A law stating that electric current is proportional to voltage and inversely proportional to resistance.
Answer:
(d) III only
Explanation:
We have to observe the motion of the bag with respect to taxi , considering taxi as stationary or inertial frame . Since bag is not moving with respect to taxi , the inertial frame that means , net force on it is zero .So option i and ii are ruled out .
Now how to explain motion of the bag ie why it is stationary ie what are the balancing force acting on it. We know that on a body on circular path , a force called centripetal force is acting on it . So that force must be acting on it . The balancing force is the frictional force which is keeping it stationary with respect to taxi . Hence the third option is correct.
Answer:
t = T/4
Explanation:
The power delivered to the mass by the spring is work done by the spring per second.
The work done by the spring is equal to the elastic potential energy stored in the spring.
The maximum energy stored in the spring is at the amplitude of the oscillation.
So the first time the mass reaches to its amplitude can be found by the following equation of motion:
When the mass reaches the amplitude:
because cos(π) = 1.
Using ω = 2π/T,
Answer:
average speed = total distance/total time
