Answer:
B.magnitude and direction
Explanation:
Vector is moved from one place to another.
Example: acceleration
only scalar have magnitude only
Example: speed , temperature
Where is the multiple choice
Answer:
1.97 m/s
Explanation:
The initial angular velocity of the blades is:
The final angular velocity is
(since the blades come to a stop)
and the time taken is
t = 30 s
So, the angular acceleration of the blades is
Now we can find the angular velocity of a blade after a time t=10 s:
The distance of the tip of a blade from the centre is equal to half the diameter, so
so, the speed of the tip of a blade is