MOTION AND TIME FOR CLASS 7

an example of rectilinear motion is

• a ball spinning

• a pendulum

• marching of a soldier

• a car in a circular track

what is speed

• velocity

• the distance from the top or surface to the bottom of something.

• the rate at which an object covers distance.it refers to "how fast an object is moving

• the phenomenon in which an object changes its position over time.

what is the formula of speed

• speed = distance ÷ time

• speed= distance × time

• speed=motion+time

• speed+velocity-depth

the meter used to measure the speed of an object

which of these is an example of periodic motion

• earth revolving around sun

• a car in a race

• phases of moon

• pendulum

the basic unit of distance is

• cm

• km

• celcius

• gram

• m

what is uniform motion

• to and fro movement

• travelling of equal distances in equal intervals of time

• moving in straight line

• going round and round

Sunitha can type 1800 words in half an hour. What is her typing speed in words per minute?

• 60 min

• 10 min

• 30 min

• 20 min

A faster moving object covers more distance in _________ time.

what is average speed

• it is same as normal speed

• the average speed is the speed which is the difference of distance and time.

• The average speed of a moving object is defined as the total distance covered by it divided by the total time taken.

• neither of the above