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Suppose that a horizontal force F is applied to a block resting on a rough surface (see Figure 6.1). As long as the applied force F is less than a certain maximum force (Fmax), the block will not move. This means that the net force on the block in the horizontal direction is zero. Therefore, besides the applied force F, there must be a second force f acting on the block. The force f must have a strength equal to F, and it must be pointing in the opposite direction. This force f is called the friction force, and because the block does not move, we are dealing with static friction. Experiments have shown that the force of static friction is largely independent of the area of contact and proportional to the normal force N acting between the block and the surface. The static friction force is
f <= us N
There are currently 79 moons that are known at this time according to NASA
Answer:
400 V
Explanation:
Electric filed , E=800 V/m
We know that
Using the formula
Hence, the potential at x=2 m=400 V
False
Weight is measured in Newtons and is dependent on gravitational force (weight = mg where m is mass and g is gravitational force). Mass is simply the amount of matter something contains.
No matter where you go, you'll always have the same mass. But if you go to the moon where there is less gravitational force, you <u>WEIGH<em /><em /></u><em> </em>less.
