Question

Which of the following describes an object in static equilibrium?

A.A platypus lies motionless on the sand.
B.A tuna speeds up from 2 m/s to 3 m/s
C.A dolphin jumps out of the water
D.A zebra shark swims at a constant speed of 8 m/s

Answer 1

Option A is the correct answer.

Step-by-step explanation:

Static equilibrium means an object object is at rest and is in a state of equilibrium.

If we examine options B, C and D we can see that, in each case object is in a state of motion.

B) Tuna is in a motion.

C) Dolphin is a motion.

D) Zebra is a motion

In option A platypus lies motionless on the sand, which is an example of static equilibrium.

so, option A is the correct answer.