A small car and a large truck are driving down a highway, which statement would support the premise that the truck has more mome
2 answers:
Answer:
A)
A large truck has a much larger mass.
Explanation:
Since we know that momentum is defined as the product of mass and velocity
so here we can say
so here more momentum will say that the product of mass and velocity will be more
so here as we compare the car and truck we can say that truck will have more momentum because the mass of the truck will always be greater than the mass of car
due to this huge difference in the mass of car and truck we can say that truck will always have more momentum than car.
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Answer:
a) A´= A
b) θ₁´ = 29º, θ₂´ = - 169º , θ₃´ = -49º
Explanation:
In this exercise you are asked to give the magnitudes and angles of the vectors from another system of
reference
a) The magnitudes
The magnitude of a vector, the size of which is a scalar, this does not depend on the reference system, since it is obtained by subtracting the coordinates of the end point minus the coordinate of the origin of the vector
A = - x₀
if the vectors are measured in another reference frame
x_{f}´ = xx_{f}- U
x₀´ = x₀ -U
where U is the distance between the two reference frames
A´ = x_{f}´ - x₀´
we substitute
A´ = (x_{f} - U) - (x₀-U) = x_{f} - x₀
A´ = A
it does not change
b) Angles
The given angles are measured from the positive part of the x axis in a counterclockwise direction, it is asked to give these angles from the x axis
θ₁ = 29º
does not change
θ₁´ = 29º
θ₂ = 191º
we measure clockwise
θ₂´ = θ₂ - 360
θ₂´ = 191 - 360
θ₂´ = - 169º
θ₃ =311º
we measure clockwise
θ₃´ = 311 -360
θ₃´ = -49º
The average speed is 0.517 m/s
The average velocity is 0.12 m/s west
<u>Explanation:</u>
When dividing the total distance covered by object by time, we get the value for average speed.
Calculate the distance without consideration of motion’s direction. So, the distance walks 144 m first, and then another 89 m, so the total distance covered is
d = 144 + 89 = 233 meters
Given t = 7.5 minutes. Convert minute into seconds,
So, the average speed can be calculates as below,
When dividing the object’s displacement by time taken, we can calculate average velocity.
In given case, the students walks 144 m west first, and then 89 m east. The displacement is the distance in a straight line between the initial and final position: therefore, in this case, the displacement is
d = 144 (west) - 89 (east) = 55 m (west)
The time taken is t = 450 s
So, the average velocity is
And the direction is west (the same as the displacement).