Match each description to one of the graphs below. A) A child runs at a constant speed for 40 s before stopping.
B)A panda moves slowly at a constant speed for 40 s before stopping.
C)A cheetah stalks his prey, moving slowly, stopping occasionally.
D)A rabbit runs away from a farmer, not stopping for anything!

I)  the correct one is A

II)  the alternatives C

III) corresponds to option D

IV)  alternative B

Explanation:

Various information can be obtained from the speed versus time graphs

* If the graph is an inclined line, the speed is constant

* if the graph is a horizontal line the velocity is zero

In this case, the first graph (I) has two parts: an inclined line that corresponds to a uniform movement with speed and a second one, so that it is a horizontal line that indicates that the body is stopped.

If we see the different alternatives, the correct one is A

The second graph (II) has a movement with constant speed second period of being stopped

This graph corresponds to the alternatives C

The third graph (III) the body moves at constant speed without stopping

This corresponds to option D

The fourth graph (IV) the body moves with a slow speed and after 40 s it stops

This graph is associated with alternative B

answer: 2×10^-2kg

explanation: density= mass per volume

vol=mass/density

converting to s.i units we have;

3÷1000kg = 0.003

1.5÷100m = 0.15

0.003/0.15 = 0.02kg

it was given as a lesson and guide for prayer.