Magnitude and Direction of Acceleration
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- 1 m/s2
- 2 m/s2
- √2 m/s2
- √5 m/s2
- uniform velocity.
- varying speed.
- uniform acceleration.
- uniform speed and acceleration of fixed magnitude.
So in 2D motion does the instantaneous acceleration always have to be along the same line as velocity( either 0 or 180 degrees)?
Yes, It has to be either at 0 or 180 degree to the velocity
It can also be perpendicular to velocity but not any other angle
In 2D acceleration will not be a vector
It can point in any arbitrary direction
- a=bcosαcosβ
- a=bcosβcosα
- a=bcos2βsinα
- a=bsin2βcosα
- 1.2 m
- 4.0 m
- 6 m
- 3.2 m
A plane flies 10 km east from city A to city B in 2 hrs and then 20 km south from city B to city C in 1 hr. For the total trip, what are the magnitude and direction of its average acceleration?
−53^i−203^j
53^i−203^j
South − east direction
South − west direction
A lorry is going north at 10 m/s and then takes a curved road and is now going east at 10 m/s. This took 10 secs. What's the average acceleration during this time?
√2 m/s2NE
10 m/s2
Zero
√ 2m/s2SE
- Particle accelerates for 0≤t<2
- Particle accelerates for 2≤t≤4
- Maximum speed attained by the body between 0 to 4 sec is 4 m/s
- Particle retards for 2<t≤4
- 1 m/s2
- 2 m/s2
- √2 m/s2
- √5 m/s2