Answer:
From 9 to 10 sec the velocity is decreasing at a constant rate.
Change in V = 20 m/s - 30 m/s = -10 m/s
Since acceleration is constant from point E to point F (straight line)
and t = 9.5 sec is on this line
a = (20 m/s - 30 m/s) / 1 sec = -10 m/s^2
1)The shovel changes the direction of the force the man applies.2)The man can apply less force.3)<span>The force applied by the end of the shovel increases.</span>
Answer: When a liquid substance is poured into a vessel, it takes the shape of the vessel, and, as long as the substance stays in the liquid state, it will remain inside the vessel. Furthermore, when a liquid is poured from one vessel to another, it retains its volume (as long as there is no vaporization or change in temperature) but not its shape.
Explanation: A solid has a definite shape and volume. A liquid has a definite volume, but takes the shape of its container. A gas lacks either a defined shape or volume. Plasma is similar to a gas in that its particles are very far apart, but a gas is electrically neutral and plasma has a charge.
Answer:
Oh! I just learned abt this
Explanation:
the body is said to be in equilibrium if it is resting or moving with uniform velocity.
Answer:
Work done, W = 0 J
Explanation:
Given that,
The total weight of the container, W = 30 N
A container of water is lifted vertically 3 m then returned to its original position. We know that the difference in final and initial position of an object is called its displacement. Here, its displacement is equal to 0 as it reaches to its original position.
Work done is given by :
As d = 0
W = 0
So, no work was done by the container of water. Hence, this is the required solution.