Explain how you know the car is accelerating when it reaches a curve on the road
2 answers:
Answer:
When car reaches to the end of the curve then due to change in the direction of the motion the car its velocity is changing and hence the motion of the car is accelerated motion.
Explanation:
As we know that the acceleration of the car is defined as rate of change in velocity
here we know that velocity is a vector quantity and the change in velocity is defined in two ways
1) change in magnitude
2) change in direction
So here when car enters the curved path then due to change in the direction of the motion of the car its velocity will change and hence we can say that its motion is accelerated motion
You might be interested in
Answer:
The force applied 275 N in a direction parallel to the hill
Explanation:
Newton's second law is adequate to work this problem, in the annex we can see a free body diagram, where the weight (W) is vertical, the friction force (fr) is parallel to the surface and the normal (N ) is perpendicular to it. In general for these problems a reference system is taken that is parallel to the surface and the Y axis is perpendicular to it.
Let us decompose the weight into its two components, the angle T is taken from the axis and
Wx = W sin θ
Wy = W cos T
We write Newton's second law
∑ F = m a
X axis
The cyclist falls at a constant speed, which implies that the acceleration is zero
fr - W sin θ = 0
fr = mg sin θ
fr = 96 9.8 without 17
fr = 275 N
When the cyclist returns to climb the hill, he must apply the same force he has to overcome the friction force that always opposes the movement . The force applied 275 N in a direction parallel to the hill
Answer:
Fapp = 3 N
Explanation:
- Applying the work-energy theorem, we know that the net work done on one object by an applied force, is equal to the change in the kinetic energy of the object.
- This work is just the product of the applied force times the displacement, as follows:
- This must be equal to the change in kinetic energy:
- Equating (1) and (2), and replacing by the givens, we can solve for Fapp, as follows:
- The magnitude of the applied force is 3 N.