Which of the following statements is/are true about Newton’s first law of motion? (i)     Newton’s first law is often referred to as the law of inertia (ii)    An object moving with a constant velocity needs a constant force to keep the velocity constant (iii)    An object in motion will continue in motion in the absence of an external unbalanced force (iv)    An unbalanced force is necessary to bring a moving object to rest  

An object initially at x1 = 5.0 m changes its position to x2 = 12 m. What is the displacement of the object?

A graph of position (x) versus time (t) of a moving object s a straight line with a slope of 3.2 m/s. Which of the following is/are true of this object? (i)    The object has a uniform speed of 3.2 m/s (ii)   The moving object has no acceleration (iii)   The object has a uniform acceleration of 3.2 m/s2

A reference frame can best be defined as

One side of a cube is 10 cm. What is its volume in liters?

If a graph of force (F) acting on an object versus the acceleration (a) of the object is plotted with F on the y-axis and a on the x-axis, the slope of the graph will be a measure of:

What happens when the temperature of an air parcel is reduced?

A moving object is at x = 4 m at t = 0 and at x = 14 m at t = 2 s. The average speed of this object is:

Which of the following is/are true according to Newton’s second law? (i)    an unbalanced force always brings a moving object to rest (ii)   an unbalanced force on an object always produces an acceleration on it (iii)   the acceleration of a moving object is directly proportional to the unbalanced force acting on it.

Which of the following is a fundamental unit? (i) kg/m3 (ii) m3 (iii) N (iv) m