Answer:
A. 20 N
Explanation:
Weight of the book = mass × acceleration due to gravity
= 2 × 10
= 20 N
Answer:
Actually, surface tension is the to force per unit length. That means formula for surface tension is = force/length . As we know that the dimensional formula for length is L . And that for force is MLT^-2. So the dimensional formula for surface tension can be obtained by dividing the dimensional formula of force and length.
Explanation:
a). We could read off the period if we had the graph.
The frequency is 1/period.
b). The velocity is the first derivative of the displacement,
so it should lag the displacement by 90° .
The acceleration is the derivative of the velocity,
so that puts it 180° behind the displacement.
c). If we could see the graph, then, knowing the pendulum's
length and the period of its swing, we could calculate the
acceleration of gravity on the planet at which he is at.
The number of 'G-forces' is
9.8 m/s² / (acceleration of gravity where he is at) .
The number is a ratio ... without units.
Answer:
<u>10 J</u>
Explanation:
work = force x distance
work = 5x2
work = 10 J
Joule is the unit for work