Answer:
A
Explanation:
When you multiply a vector by a scalar the magnitude will change but the direction will not change.
Answer:
The true velocity of wind will be 43.1 km/h.
Explanation:
Given that,
Velocity of motor
The resultant velocity of wind
Suppose, the true velocity of wind is .
We need to calculate the true velocity of wind
Using formula of resultant velocity
Where, = velocity of motor
= velocity of wind
= resultant velocity
Put the value into the formula
The magnitude of true velocity is,
Hence, The true velocity of wind will be 43.1 km/h.
Answer:
magnitude of v = 2.5 m/s, and in the same direction as the initial velocity of the 5 kg ball.
Explanation:
We use conservation of linear momentum in an elastic collision to solve for the unknown velocity v:
Pi = Pf
5 kg * 5 m/s + 10 kg * 0 m/s = 5 kg * 0 m/s + 10 kg * v
25 kg m/s = 10 kg * v
v = 25/10 m/s
v = 2.5 m/s
and in the same direction as the initial velocity of the 5 kg ball.