Answer:
BC ≈ 14.7 m
Step-by-step explanation:
Using the Sine rule in Δ ABC
=
To find ∠ A subtract the 2 given angles from 180°
∠ A = 180° - (90 + 28)° = 180° - 118° = 62°
Then
=
( cross- multiply )
BC × sin28° = 7.8 × sin62° ( divide both sides by sin28° )
BC = ≈ 14.7 m ( to 3 significant figures )
Answer:
Step-by-step explanation:
Given that the position vector of a moving body at time t is
Velocity is the derivative of acceleration
v(t) = , t positive
Speed would be the magnitude of the velocity and will not have direction
Speed =
Acceleration of the object
a(t) = derivative of velocity of vector
=
i.e. acceleration would be in the direction of x axis alone.