hello!!

Hello!! It's me Ramina Lyn..
today in class, we corrected the test, then we started the new lesson "Dynamics". Also we got 4 sheets about dynamic from Ms. k...


here's the correction...

1. Vector quantities
- position
- force
- displacement
- acceleration
- velocity

2. Measure initial and final velocities (add them) and then divide by two or Calculate total displacement divided by time.

3. constant (uniform)

4. a) 650 km
b) 150 km [E]

5. a) 108 km/h

b) 25 km/h [E] ---> 30 km/h [E]

6. a) +10 m
b) 0m
c) -40 m
d) 0m

7. a) +2m/s
b) 0m/s

8. a) Car moving at a constant (uniform) velocity of 0m/s
b) cars slowing down
c) 0m/s
d) -5 m/s2

9. +180 m/s

10. --> start a distance away from motion sensor , stand still
------> walk at a constant speed towards motion sensor and then past it
------> stand still

11. 5.0 m/s2

12. 1120 m

13. 28 m

14. 916. 67 m/h or 920 m/h

We also read the Four Fundamental Forces..

The four fundamental forces are: gravitational, electromagnetic, strong nuclear, and weak nuclear force.

Gravitational Force - an attraction between two objects because of their mass. It is the weakest of the foue force. Range is unlimited and attractive.Also the least selective because it acts between all particles.

Electromagnetic Force - the force that charged particles exert on each other. It binds together the atoms and molecules that make up the matter that we see around us. It can be either attractive or repulsive. It is much stronger than the gravitational force and its range is also unlimited.

Strong Nuclear Force - an attractive force that holds protons and neutrons in the nucleus of an atom. It is the strongest of the four force, but only acts over small distances.

Weak Nuclear Force - million times fainter than strong force and hundred times shorter in range. Much stronger than the gravitational force. It is involved in the radioactive decay of some nuclei. It has been linked with the electromagnetic force.

ok that's all we did today =)

the next scribe is larlyn...