Inertia is that property of a body by virtue of which the body is

$A$ mass of $2\, kg$ is suspended from a rigid support by a thread $AB$. Another thread $CD$ of the same type is attached to the lower end of the $2\, kg$ mass. If the lower thread $CD$ is pulled with a sudden jerk,what happens?

Passengers standing in a bus are thrown outwards when the bus takes a sudden turn. This happens because of

What was Aristotle's view regarding motion? How was it wrong? What is the flaw in his argument?

For ordinary terrestrial experiments,which of the following observers is inertial?

$A$ trolley of mass $300 \; kg$ carrying a sandbag of $25 \; kg$ is moving uniformly with a speed of $27 \; km/h$ on a frictionless track. After a while,sand starts leaking out of a hole on the floor of the trolley at the rate of $0.05 \; kg \cdot s^{-1}$. What is the speed (in $km/h$) of the trolley after the entire sandbag is empty?