The correct answer is A car travels South for 5 miles, turns around, and travels North for 8 miles.
Explanation:
Displacement is determined by the change in position. This means there is displacement if the initial position of a body such as a car is different from the final position. Also, the displacement is considered in terms of direction (North, South, East, West). In this context, if a car travels South or North and then returns to its initial position there is no displacement.
According to this, the only option that shows a displacement North is "A car travels South for 5 miles, turns around and travels North for 8 miles" because in this case, the car had a change in position as it first moved 5 miles south (a displacement of 5 miles South) and then 8 miles north, which changes the displacement to 3 miles North (5 miles South - 8 miles North = 3 miles North).
Explanation:
a)
θ = 4.91 + 9.7t + 2.06t² when t = 0
θ = 4.91 rad
θ = 4.91 + 9.7t + 2.06t²
ω = dθ/dt = 9.7 + 2.06t, when t =0
ω = dθ/dt = 9.7 + 0
ω = 9.7 rad/s
α = d²θ/dt² = 2.06
α= 2.06 rad/s²
b) please use same method above for t = 2.94 s
Answer:
12
Explanation:
The equation is w= f *d
36=3*d
12=d 12 units is the mass
<span>v/2
This is an exercise in the conservation of momentum.
The collision specified is a non-elastic collision since the railroad cars didn't bounce away from each other. For the equations, I'll use the following variables.
r1 = momentum of railroad car 1
r2 = momentum of railroad car 2
x = velocity after collision
Prior to the collision, the momentum of the system was
r1 + r2
mv + m*0
So the total momentum is mv
After the collision, both cars move at the same velocity since it was non-elastic, so
r1 + r2
mx + mx
x(m + m)
x(2m)
And since the momentum has to match, we can set the equations equal to each other, so:
x(2m) = mv
x(2) = v
x = v/2
Therefore the speed immediately after collision was v/2</span>
Answer:
A principle of material science which expect that bunches of particles delivered by development of electrons adjust themselves in bunches (called "spaces") in attractive materials. The heading of attractive field at a point is the heading to which a free north shaft would move in the event that set at that point within the field.