A car of mass 960.0 kg accelerates away from an intersection on a horizontal road. When the car speed is 51.1 km/hr (14.2 m/s),
1 answer:
Answer:
Explanation:
The power supplied by the engine is given by
P = Fv
where
F is the force applied
v is the velocity of the car
Here we have
P = 3700 W
v = 14.2 m/s
So we can solve the equation to find the average force:
The net force applied on the car is also equal to
F = ma
where
m = 960.0 kg is the mass of the car
a is the acceleration
Re-arranging the equation, we find the acceleration:
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The correct answer is :
Unit vectors I and j along the x-axis and y-axis, respectively, define the Cartesian coordinate system. The radial unit vector r, which indicates the direction from the origin, and the unit vector t, which is orthogonal (perpendicular) to the radial direction, together create the polar coordinate system.
We can obtain the horizontal component by applying the trigonometric identity of Cos(Ф), and if we obtain the component on the x axle, such as 22000 (m)×Cos(51°) = x, we may determine that x = 13845.05 metres. We need to obtain the vector components because we already know the distance and the angle.
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