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Answers
Answer:
Explanation:
1.
one kilogram -force is the force due to gravity on a mass is 1 kg = mass of 1kg * acceleration due to gravity (g) m/s2.
Since the average value of g is 9.8 m/ s2.
SI unit of force is Newton
2.
A major difference between tangential acceleration and centripetal acceleration is their direction. Centripetal means “center seeking”. Centripetal acceleration is always directed inward. ... Tangential acceleration results from the change in magnitude of the tangential velocity of an object.
3.
The passengers of a boat are not allowed to stand because: ... this will raise the centre of gravity and the boat will be rocked. B2. this will lower the centre of gravity and the boat will be rocked.
4.
static equilibrium means the resultant force is zero and the object is not moving.
Examples are: an object (e.g book) lying still on the surface (e.g table). no resultant moment about a pivot, so clockwise moment equals anticlockwise moment and there is no resultant force and no motion either.
An example of dynamic equilibrium is a book sliding straight down along an inclined plane with a constant speed. The three forces acting on the book, gravitational force, kinetic frictional force and normal force, all add to give a zero net force and the object is sliding down the incline at a constant speed.