Olympiad Test: Motion And Time - Class 7 MCQ

Mean solar day = 24 h
= 24 × 60 × 60
= 86400 seconds 

In a constant speed the change in position of the body remains the same for a particular interval of time. Break time axis into small parts and see the distance travelled in each of these parts is the same in choices A, B and C (zero in ‘C’). But the distance changes in ‘D’. 

 Swinging pendulum is also under the influence  of gravitational force and is also changing its direction - hence it is not in uniform motion. It is non – uniform motion.
 

An odometer measures distances. 

The time taken by P is the lowest among the four, because more is the area under the wine, greater is the speed. Hence, P is the fastest. 

A light year is the distance covered by light in one year, so it is the unit of distance and not of time. 

Speed is the change of position of the body with respect to time. From the graph It increases and then becomes constant but not zero