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force?
Answer the following questions in brief.
What is a contact force? Give two examples.
2. Write two characteristics of magnetic force and gravitational force,
3. How much would you weigh on an imaginary planet that has no gravitational
Define atmospheric pressure. How does it vary with altitude?
Name the different effects that an applied force may have on a body.
6. Why are board-pins made sharp?
7. Define pressure and its Sl unit.
Answer the following questions in detail.
Answers
Answer:
1) contact force is any force that requires contact to occur. Contact forces are ubiquitous and are responsible for most visible interactions between macroscopic collections of matter. Pushing a car up a hill or kicking a ball across a room are some of the everyday examples where contact forces are at work
2)Gravitational force is always an attractive force. 2. Gravitational force between two bodies is independent of the medium between them. ... Gravitational force is a long range force.
7)Pressure is the amount of force applied perpendicular to the surface of an object per unit area and the for it is p (or P). The SI unit for pressure is the pascal (Pa), equal to one newton per square metre (N/m2, or kg·m−1·s−2). Pascal is a so-called coherent derived unit in the SI with a special name and symbol