Answer:
Ohm’s Law states that current is proportional to voltage; circuits are ohmic if they obey the relation V=IR.
Explanation:
LEARNING OBJECTIVES
Contrast shape of current-voltage plots for ohmic and non-ohmic circuits
Ok, a couple of things have to be accounted for here. First, since the block is moving relative to the wall we have to use the
kinetic coefficient of friction, 0.40. The second consideration is that since the block is moving at a constant velocity, the acceleration is
zero. This means, by Newton's second Law, that the net force is zero. So the force of gravity must be equal to the friction force of the wall resisting its fall. This friction force is the product of the normal force (which we are seeking) and the kinetic coefficient of friction. We can then set these two forces equal:
Answer:
Speed and velocity both measure an object’s rate of motion. However, speed is a scalar quantity, which means that it can be described with a numerical value. Velocity is a vector quantity, which depends on direction as well as magnitude. Read these definition for more information:
speed - the rate of distance traveled by a moving object over time
velocity - the rate of displacement of a moving object over time
Basically, an object’s speed tells you how fast it’s going. Its velocity tells you how fast it’s going in a certain direction. You use speed measurements in your daily life, but physicists depend on velocity measurements more frequently in their work.
Explanation:
Speed= (4.92-2.45) 2.47 m/s
Distance= ?
You didn't mention about the distance?
Choice 'D' describes speed in the metric units 'meter' and 'second'.
With no mention of direction, it can't be called 'velocity'.
