Question

(i) How many numbers of significant figures are in 0.007 m2

(A) 4 (B) 3 (C) 2 (D) 1 (1)

(ii) When a body falls freely under gravity, then it moves with a constant

(A) speed (B) velocity

(C) acceleration (D) None (1)

(iii) Which of the following is a scalar quantity?

(A) Acceleration (B) Force

(C) Speed (D) linear momentum (1)

True / false statement

(iv) The dimensional formula for speed and velocity is same. (True / false) (1)

Fill in blanks

(v) The dimensional formula for force is ………. (1)

One word/ definition question

(vi) Define unit Vector. (1)

Two marks Questions

Q2. Draw the velocity- time graph for uniform motion and uniform accelerated motion. (2)

Q3. Write two differences between speed and velocity. (2)

Q4. Write two uses of dimensional analysis. (2)

Three marks Questions

Q5. Show that S = ut + ½ at2

for uniform accelerated motion by any method . (3)

Or

Determine the value of m, so that vectors

A i m j k = + + 2

and

B i j k = − + 4 2 2

are perpendicular to each

other? (3)

Five marks Questions

Q6. State Triangle law of vector addition. By using this law find the relation for magnitude and direction of

resultant of two vectors analytically. (5)

Or

Define projectile. Find the relation for Time of flight, maximum height, Horizontal range and maximum horizontal

range when projectile fired at some angle with horizontal. (5)​

Answer 1

Explanation:

ok bye, I think you got what I want to tell you.

Answer 2

1,i.(D) 1

ii.(C)acceleration

iii.speed

iv.true

v.[MLT^-2]

3.speed-scalar,distance/time

velocity- vector , displacement/time

4.to check whether an equation is dimensionally correct.

to derive an equation