Mechanics | Relativity Answers

When writing the results of an experimental observation in terms of significant digits, all non-zero digits are -----------------

A. significant
B. to be discarded
C. to be rounded off
D. to be truncated

An experiment which gives a straight line graph with positive intercepts on both axes of the graph has a ------------------- slope

A. positive slope
B. negative slope
C. zero slope
D. inverse slope

The slope of the tangent to a curve which is parallel to the horizontal axis of the graph is ----------

A. zero
B. one
C. infinite
D. insignificant

In a simple pendulum experiment,  T2/s2
is plotted on the vertical axis while ------------- is plotted on the horizontal axis

A. l2/m2
B. 1/lcm-1
C. l/cm
D. logl

The effect of reducing the length of a simple pendulum is to ----------

A. increase its period
B. decrease its frequency
C. increase its amplitude
D. increase its frequency

If an oscillatory motion must be simple harmonic, the restoring force F must obey ------------------ law for small displacements from equilibrium position

A. Achimedes'
B. Kepler's
C. Hooke's
D. Newton's

A student wants to use the inclined plane to measure the coefficient of friction but he was not supplied with a protractor. He measures the height h and the horizontal distance of the free end of the plane from the floor x when the wooden block on the plane just begins to move. Which of the following correctly gives the coefficient of friction?

A. h/x
B. sin(h/x)
C. tan(h/x)
D. cos(h/x)

In an experiment involving the spiral spring, F is the restoring force and x the extension of the spring. The equation F = - kx gives the relationship between F and x. The graph of F/N against x/cm -----------------

A. passes through the origin
B. has an intercept on the vertical axis
C. has an intercept on the horizontal axis

The slope of the graph of T2 plotted on the vertical axis against l on the horizontal axis is used to determine the value of -----------

A. frequency
B. period
C. phase
D. acceleration due to gravity

In an experiment to determine the period of oscillation of a loaded spiral spring, T2 was plotted on the vertical axis and M on the horizontal axis. T is the period while M is the effective mass. Which of the following is CORRECT?

A. the slope of the graph gives the acceleration due to gravity, g
B. the inverse of the slope of the graph gives M
C. the intercept on the vertical axis of the graph gives M
D. the intercept on the horizontal axis of the graph gives M