Explanation:
The total distance travelled by an object divided by total time taken is called the speed of an object. Its formula is given by :
Speed is a scalar quantity. It has only magnitude but no direction.
The total displacement of the particle divided by total time taken is called the velocity of that object. It is given by :
D is the displacement or shortest path covered
Velocity is a vector quantity. It have both magnitude and direction.
Both speed and velocity of an object are same. The only difference is that the speed is a scalar quantity while the velocity is a vector.
The statement that best explains the difference between velocity and speed is (A) i.e. "Velocity is speed with a direction".
Answer: Work done by the box will be 8 Joules.
Explanation:
Work done by a substance is the product of the force applied on it and the displacement of a substance.
Mathematically,
Where,
W = work done = ? J
F = Force applied = 4 N
s = displacement = 2 m
Putting values in above equation, we get:
Hence, work done by the box will be 8 Joules.
This ratio (Fnet/m) is sometimes called the gravitational field strength
and is expressed as 9.8 N/kg ⇒ answer D
Explanation:
The gravitational field strength at a point is:
From the notes above
The ratio = Gravitational field strength (g)
The answer is:
This ratio (Fnet/m) is sometimes called the gravitational field
strength and is expressed as 9.8 N/kg
Learn more:
You can learn more about gravitational field strength in brainly.com/question/6763771
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