एक तैराक पानी को पीछे की ओर धकेलता है। न्यूटन के तीसरे नियम के अनुसार तैराक को आगे बढ़ाने वाला प्रतिक्रिया बल कौन सा है?

The tendency of an object to resist a change in its state of motion is called:

A box of mass 15 kg is kept on the floor of a stationary trolley. The coefficient of static friction between the box and the trolley is 0.12. To keep the box stationary relative to the trolley, the maximum horizontal acceleration (in m/s2) with which the trolley can move is: (g = 10 m/s2)