Answer:
The final velocity of the vehicle is 10.39 m/s.
Explanation:
Given;
acceleration of the vehicle, a = 2.7 m/s²
distance moved by the vehicle, d = 20 m
The final velocity of the vehicle is calculated using the following kinematic equation;
v² = u² + 2ah
v² = 0 + 2 x 2.7 x 20
v² = 108
v = √108
v = 10.39 m/s
Therefore, the final velocity of the vehicle is 10.39 m/s.
Answer: friction reduces the speed during motion
Explanation:
The more the friction, the lesser the speed during motion
To solve this problem it is necessary to apply the concepts related to Kinetic Energy, specifically, since it is a body with angular movement, the kinetic rotational energy. Recall that kinetic energy is defined as the work necessary to accelerate a body of a given mass from rest to the indicated speed.
Mathematically it can be expressed as,
Where
I = Moment of Inertia
Angular velocity
Our values are given as
A revolution is made every 4.4 seconds.
If the angular velocity is equivalent to the displacement over the time it takes to perform it then
Replacing at our previous equation we have,
Therefore the kinetic energy is equal to
the red giant is very tall and the red dwarf is very short.