Question

The moon moves in _____ around the earth.
A) Uniform circular motion
B) Non uniform circular motion
C) Retarded motion
D) Constant velocity

Answer 1

Here we have to examine each of the options one by one and see what each of them means to get the answer. When the moon moves around the earth it is called the revolution of the moon.

Complete step by step solution:
Uniform Circular Motion: In uniform circular movement, the object executing circular movement has a steady speed and the circle is at a fixed range. In the event that the speed of the object is changing also, at that point we present an extra increasing speed toward the path tangential to the circle.
For e.g. Moon moves in uniform circular movement around the earth. It is the power of gravity of the earth which keeps the moon in a uniform circle around it.

Non-Uniform Circular Motion: Non-uniform circular movement indicates an adjustment in the speed of the object moving along the round way. Note that particularly the adjustment in the speed vector sizes, meaning change in the measurement of speed.

Retarded Motion: When a body goes opposite to the direction of motion, it is known as retarded motion. Retardation can also be said as negative acceleration. On the off chance that the speed of a body is diminishing regarding time, the increasing speed is supposed to be negative. Retardation is the pace of lessening in speed.

Constant Velocity: Constant velocity implies the acceleration is zero. The adjustment in speed over a specific time span equals the area under the acceleration graph over that interval. For this situation the speed doesn't change, so there can be no area under the acceleration graph.

Hence from the above discussions we can see that option (A) is correct.

Note: Here we have to know about uniform circular motion and non-uniform circular motion in detail to get the answer. A uniform circular motion can only keep a body at a constant speed.