Law Of Motion - Study Mode

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[#96] A bullet of mass 10 g is fired with a velocity of 20 m/s from a gun of mass 2 kg. Find the recoil velocity (in m/s) of the gun.

(A) 1

(B) 0.2

(C) 0.1

(D) 2

Correct Answer

(C) 0.1

[#97] If 20 N force is applied on an object of mass 10 kg, what will be the acceleration?

(A) 100m/sec 2

(B) 200m/sec 2

(C) 5m/sec 2

(D) 2m/sec 2

Correct Answer

(D) 2m/sec 2

[#98] Kiran swims in a 90 m long pool. She covers 360 m in two turns by swimming from one end to the other and back along the same position of straight path. Find the average velocity of Kiran.

(A) 0 ms -1

(B) 3 ms -1

(C) 5 ms -1

(D) 4 ms -1

Correct Answer

(A) 0 ms -1

[#99] The tendency of an object to resist change in static or dynamic condition is called-

(A) momentum

(B) force

(C) velocity

(D) inertia

Correct Answer

(D) inertia

[#100] When net torque is zero, . . . . . . . . will be constant.

(A) force

(B) angular momentum

(C) linear momentum

(D) acceleration

Correct Answer

(B) angular momentum