Test F.Sc Physics 1st year Chapter No.3 and 4. Long Questions

Q.No.3: - Attempt any two                               2   x  5   =  10

(i) Calculate the (a) time of flight (b) height of projectile (c) range of projectile

(ii) Derive the relation of absolute of P.E at the surface of Earth.

(iii) State and explain law of conservation of energy.

(iv) Find the final velocities of balls after an elastic collision.

Test F.Sc Physics Chapter no.3 and 4 short questions

Q.No.2: -Write the answer of the following questions.   2   x   5  =  10

(i) Prove that the units of impulse and momentum is same.

(ii) State isolated system and also describe that why is it important for law of conservation of momentum?

(iii) If two balls collide and after collision the magnitude of their velocities will remain same but their direction changes. Explain which type of collision both the balls will suffer.

(iv) Let two balls collide in such a way that their collision is perfectly elastic and both the balls are of same mass and the velocity of second ball is zero. Find the velocities of both the balls after collision?

(v) If you move with a bag in your hand and you move in the forward direction then what will be work done by your force and gravitational force? Explain it.

Test F.Sc Physics 1st year Chapter No.3 and 4. M.C.Qs

(i) The dimensions of impulse is that of

(a) Power            (b) velocity             (c) momentum            (d) acceleration

(ii) The time rate of change of momentum is called

(a) Velocity          (b) distance             (c) momentum           (d) force

(iii) The time rate of change speed is called

(a) Acceleration     (b) jerk                  (d) velocity                 (d) non of these

(iv) When we projected the ball with some velocity vi at an angle with the x-axis then the value of velocity at the highest point of its flight will be equal to its

(a) x-component    (b) y-component    (c) (d) non of these

(v) At which angle the range of projectile will be equal

(a) ϴ=45⁰ , 30⁰      (a) ϴ=30⁰ , 60⁰      (a) ϴ=60⁰, 90⁰            (d) non of these

(v) We can calculate the momentum by using

(vi) The work done will be zero if ϴ is

(a) 270⁰, 90⁰            (b) 0⁰, 180⁰            (b) 90⁰, 0⁰             (b) 0⁰, 360⁰

(vii) The work done by gravitational force is

(a) Independent of path (d) dependent of path(c) both (a) and (b).

(d) Non of these

(viii) The dimension of power is



(ix) is the dimension of

(a) Power                 (b) velocity                (c) work                  (d) K.E

(x) The absolute P.E at infinite distance will be

(a) ∞                         (b) 0                            (c) maximum            (d) non of these