Advertisements
Advertisements
Question
What is the ratio of SI to CGs units of force?
Solution
SI unit of force is Newton whereas CGS unit of force is dyne.
1 newton / 1dyne = 105.
APPEARS IN
RELATED QUESTIONS
The north pole of a magnet ______ the north pole of another magnet.
Make a match
| A group | B group |
| 1. Fluid | a. Higher pressure |
| 2. Blunt knife | b. Atmospheric pressure |
| 3. sharp needle | c. Specific gravity |
| 4. Relative density | d. Lower pressure |
| 5. Hecto pascal | e. Same pressure in all directions |
Explain giving two examples of following :
Contact forces
Give one example in each case where :
The force is of contact, and
Force is at a distance
A spring is compressed against a rigid wall. Draw a neat and labeled diagram showing the forces acting on the spring.
Give one example in each of the following cases where a force:
(i) Stops a moving body.
(ii) Moves a stationary body.
(iii) Changes the size of a body.
(iv) Changes the shape of a body.
Which of the following is a contact force:
A car of mass 800 kg, moving at 54 kmh−1 is brought to rest over a distance of 15 m. Find the retarding force developed by the brakes of the car.
A car of mass 1000 kg develops a force of 500 N over a distance of 49 m. If initially, the car is at rest find
- Final velocity
- time for which it accelerates.
What is a non-contact force?
