Significant Figure

DEFINITION

significant figure is the number obtained through measurement consisting of the numbers given (read on the measuring instrument) and the last number are estimated.

 

RULES 

1.   All the digits (1, 2, 3, 4, 5, 6, 7, 8, & 9) other

Kinematics Problem Solving

Problem solving 1

A particle moves with equal position with respect to time:

r (t) = 3t2 – 2t + 1

with t in seconds and r in meters.

Determine:
The speed of the particle at t = 2 second

Torque

Torque, moment, or moment of force is the tendency of a force to rotate an object about an axis, fulcrum, or pivot. Just as a force is a push or a pull, a torque can be thought of as a twist to an object. Torque is the result of a cross between a position vector r with a force F.

Measurement

MEASURING LENGTH

Metre Rule

ruler is length measuring tools are often used. This instrument has the smallest scale of 1 mm or 0.1 cm. Rulers have half of the measurement accuracy of 0.5 mm smallest scale. At the time of taking measurements with a ruler, gaze must be perpendicular to the scale on the ruler and measured object. If not straight, it will cause an error in measurement, can be larger or smaller than its original size.

Momentum, Impulse, and Collision

Momentum

Momentum can be defined as the multiplication of the mass of the object to the speed of the object. It is a derivative of the magnitude of mass, length, and time. Momentum is the amount of derivatives that arise due to moving heavy things. In physics magnitude of this derivative is denoted by the letter “P”. Here’s the formula momentum

P = m V