Answer:
Computers make people's lives easier and more comfortable: they provide opportunities for staying in touch to billions of people who may very well be in different parts of the world. Today people can drive computerized cars and work for employers from other countries without even seeing them.
Answer:
gravity
Explanation:
Gravity pulls the planets toward the Sun. Gravity pulls the moon toward Earth. Gravity pulls us toward the Earth. Gravity is a force. Inertia.
Answer:
a) 
, b) 
Explanation:
a) The physical system for the ball is modelled after the Impulse Theorem. The Impulse to accelerate the ball is:
The acceleration of the ball is derived as follows:
b) The net forced is obtained by the use of the concept of force for a system with a constant mass:
Its mass and net force acting on it
Answer:
Tying a 4 weight pound on a string is a potential energy because it is at rest but cutting it and letting it fall experiences a kinetic energy because it will be in motion.
