C. SHORT-ANSWER QUESTIONS (TYPE 1): Answer in
1. What two things fully describe a force? Push ono
2. If several forces act in different directions on a body, in
3. If an object is thrown up, it finally comes down. Why?
4. What is the difference between mass and weight?
5. Why can a magnet act from a distance?
6. What is pressure? What does pressure depend on?
7. What is atmospheric pressure? What is it caused by?
Answers
Explanation:
1)A force is a vector quantity. As learned in an earlier unit, a vector quantity is a quantity that has both magnitude and direction. To fully describe the force acting upon an object, you must describe both the magnitude (size or numerical value) and the direction.
2)If several forces act on a body in different directions, the effect on the body will be due to the magnitude and direction of the net force a
cting on it. So, the body will move in the
direction of the resultant force.
3)If an object is thrown up, it finally comes down because of the force of gravity. Gravity is the force with which the earth pulls everything towards itself.
4)The mass is essentially "how much stuff" is in an object. ... Weight: There is a gravitational interaction between objects that have mass. If you consider an object interacting with the Earth, this force is called the weight. The unit for weight is the Newton (same as for any other force).
5)magnet has a magnetic field around it. The strength of the magnet decides how large the magnetic field would be. So if any object comes in the magnetic field of a magnet some amount of force is experienced by it even if it is not in direct contact with the magnet. Thus, a magnet can act from distance.
6)Pressure is a scalar quantity defined as force per unit area. ... As such, pressure depends on the amount of gas (in number of molecules), its temperature, and the volume of the container.
7)atmospheric pressure. [ ăt′mə-sfîr′ĭk ] The pressure at any location on the Earth, caused by the weight of the column of air above it. At sea level, atmospheric pressure has an average value of one atmosphere and gradually decreases as altitude increases. Also called barometric pressure.