Soni says that the acceleration in an object could be zero even when several forces are acting on it. Do you agree with her? Why?

Yes, mechanical energy comprises both potential energy and kinetic energy. Momentum is zero which means velocity is zero. Hence, there is no kinetic energy but the object may possess potential...

No. Since mechanical energy is zero, there is no potential energy and no kinetic energy. Kinetic energy being zero, velocity is zero. Hence, there will be no momentum.

Yes. Even when an object experiences a net zero external unbalanced force, it is possible that the object is travelling with a non-zero velocity. This is possible only when the...

(i) When food is kept for a very long time, it gets oxidized and becomes rancid. (ii) Sheena suggested her mother to keep the snacks in an air tight container. (iii) Intelligence,...

(b) The acceleration at t = 0 may be zero.  (c) If the acceleration is zero from t = 0 to t - 10s speed is also zero in this interval.  (d)...

(d) He might have used noninertial frame. Explanation: (d) is true because if a particle with no force acting on it is viewed from a non-inertial frame that is moving with a...

(c) Let Farah’s age at the time of her marriage be x. Then, (x +8)= x  x 9/7 9x /7 -8 =8 x=8*7/2= 28 years Farah’s present age = 28 + 8 =...

(d) He might have used noninertial frame. Explanation: Because if a particle with no force acting on it is viewed from a non-inertial frame that is moving with a certain acceleration, then...

(b) must not accelerate  (c) may move Explanation:  If there is no/zero resultant force acting on a system, there will be no acceleration. Hence (b), not (d).  If it is already moving with a...