An object follows a curved path. The following quantities may remain constant during the motion (a) speed

When the object moves upwards, the work done by gravity is negative (as the direction of gravitational force is towards the Earth’s center) and when the object come downwards, there...

The object is in motion, so its energy = kinetic energy = 1 /2 mv2  The kinetic energy of the object, when it comes to rest = 0.  Work done on object...

(a) All quantities may be represented dimensionally in terms of the base quantities. (b) A base quantity cannot be represented dimensionally in terms of the rest of the base quantities. (c) The...

(a) speed (d) magnitude of acceleration. Explanation:  On a curved path, instantaneous direction of movement changes continuously. So, a vector can not remain constant on a curved path because it has both magnitude and direction. In the...

(a) angular momentum (b) linear momentum Explanation:  If L be the angular momentum, then external torque = dL/dt  But given that it is zero, so dL/dt =0  →L = a constant.  Similarly, it can be shown that...

(d) Angular momentum. EXPLANATION:  The speed in an elliptical orbit is not constant and hence not the kinetic energy. So (a) and (c) are not true. The radius vector also does not sweep equal...

(iii) Elongated path

(a) All quantities may be represented dimensionally in terms of the base quantities. (b) A base quantity cannot be represented dimensionally in terms of the rest of the base quantities. (c) The...

(a) angular momentum (b) linear momentum Explanation:  If L be the angular momentum, then external torque = dL/dt  But given that it is zero, so dL/dt =0  →L = a constant.  Similarly, it can be shown...

(d) Angular momentum. EXPLANATION:  The speed in an elliptical orbit is not constant and hence not the kinetic energy. So (a) and (c) are not true. The radius vector also does not...