grade 9 lesson one

the distance covered by the a moving body through a unit time is ..............

• weight

• density

• speed

• motion

A moving bus covers a distance of 500 m in 25 sec . so its speed equal .............

• 200 m / sec

• 20 Km / sec

• 20 m / sec

• 40 m / sec

if the uniform speed of a car is 72 Km / h , so its speed (in m /sec ) is

• 20 m/sec

• 25 m/sec

• 18 m/sec

• 40 m / sec

in case of motion of that is described as movement at an irregular speed , in this case it is useful to refer to another term which is the .......... speed

• uniform

• scaler

• vector

• average

the speed of a moving object relative to an observer in another moving object is called ........... speed

• uniform

• average

• relative

• irregular

if a car (A) moves at speed of 80 Km / h and a car (B) moves at a speed of 50 Km/ h in the same direction , the speed of car (A) relative to a passenger in car (B) is ........... Km / h

• 50

• 80

• 30

• 130