9th class unit-2 p.s. section-1 (Answer all questions) 5x1=5m

1). Define rest

2). Express 36km/h in m/s.

3). A train takes 3h to travel from Balipara to Guwahati with a uniform speed of 70km/h. Find the distance between the two cities.

4) Fill in the blanks: -------------------- is a fixed point with respect of which a body is at ------------- or in -------------- .

5) What is velocity in terms of speed?

Section-2 (Answer any three questions) 3x2=6m

6) An ant travels a distance of 8 cm from P to Q and then moves a distance of 6 cm at right angles to PQ. Find its resultant displacement.

7) The train ‘A’ travelled a distance of 120 km in 3 hours whereas another train travelled a distance of 180 km in 4 hours. Which train travelled faster?

8).Which of the following is true for displacement? (a) It cannot be zero. (b) Its magnitude is greater than

the distance travelled by the object.

9) Suppose that you run along three different paths from location A to location B. Along which path(s) wouldyour distance travelled be different than your displacement?

Section-3 ( Answer any one question) 1x4=4m

10)(a) Categorize the following quantities by placing them under one of the two column headings.

displacement, distance, speed, velocity,

b). A quantity that is ignorant of direction is referred to as a _________________.

c). A quantity that is conscious of direction is referred to as a _________________.

11)Explain the following terms – uniform speed, non-uniform speed, instantaneous speed and average speed.

Answer all questions 20x1/2 = 10m

( Multiple choice questions )

1) A faster moving object covers -----------

A) less distance in more time B) more distance in more time C) less distance in shorter time

scalars vectors

D) more distance in shorter time

2) If an object, moving along a straight line,keeps changing its speed, then the motion is said to be in --------

A) uniform motion B) non uniform motion C) stationary D) a fast motion

3) In this velocity – time graph what happens to veiocity between B & C ------

A) increasing B) decreasing C) no change D) stationary

4) We can tell ---------- by looking at the odometer of an automobile -------

A) average speed B) uniform speed C ) displacement D) instantaneous speed

5) This distance – time graph shows -------

A) uniform speed B) non uniform speed C) average speed D) net displacement

Fill in the blanks

6) A train moving with a constant speed of 90 km/hr. Its acceleration is -----------------

7) What is the average speed of the car ,if it covers 300 Km in 6 hours -----------------------

8) Rest and motion are --------------------- terms.

9) This distance – time graph shows that the object is in ------------------------ motion

10) represents ------------------------

11) The state of motion of a passenger with reference to the driver in a moving car is at---------------

12) A person travels a distance r along the circumference of a circle of radius r . Displacement of the person

is------------------------

13) When a graph of a quantity vs another quantity is a straight line, the quantities are -------------------------------

14) When an object is in uniform motion,its path looks like a ---------------------------line

15) If a body is moving in a curved path , the direction of velocity is given by the----------------------------------- drawn

at a point on the curve.

Match the following

16) Distance ( ) a) m / s

17) uniform velocity ( ) b) m

18) average speed ( ) c) m / s2

19) acceleration ( ) d) m

20) displacement ( ) e) m / s