The combining ratio of potassium with bromine is KBr I think.
Answer:
The frictional force points up the incline.
Explanation:
It is given that, the crate is at rest on the incline. We know that the forces acting on the crate are force of gravity, normal and the force of friction. We know that the frictional force is the force that opposes the motion of an object.
In this case the crate is at rest. The crate will have static friction, that points up the incline.
So, the correct option is (A) "the frictional force points up the incline".
Weight equals mass times gravitational acceleration=400N, so mass=400/9.8=41kg approx.
When potential energy <u>decreases</u>, kinetic energy increases.
<h3><u>Answer</u> :</h3>
◈ As per newton's second law of motion, Force is defined as the product of mass and acceleration
Mathematically,
Unit of mass : kg
Unit of acceleration : m/s²
Therefore,
Unit of force ➠ <u>kg m/s²</u>
SI unit : <u>N (newton)</u> or <u>kg m/s²</u>
