Answer:
91 m
Explanation:
v₀ = 2.5 m/s
a = 4.2 m/s²
t = 6.0 s
Find: Δx
Δx = v₀ t + ½ at²
Δx = (2.5 m/s) (6.0 s) + ½ (4.2 m/s²) (6.0 s)²
Δx = 90.6 m
Rounded to the nearest whole number, the distance traveled is 91 m.
The correct answer is: acceleration.
In fact, the slope of the graph of velocity versus time corresponds to the ratio between the variation of v and the variation of t:
But this is exactly the definition of acceleration:
, so acceleration is the correct answer.
Answer:
The current flowing through the wire is 9 A.
Explanation:
Given;
quantity of charge passing through the wire, Q = 36 C
duration of the charge flow, t = 4 s
The current flowing through the wire is calculated as;
Q = It
I = Q / t
where;
I is the current flowing in the wire
I = 36/4
I = 9 A
Therefore, the current flowing through the wire is 9 A.
Copper is a better conductor.
Answer
D. The average speed is 2.5 meters/second, and the average velocity is 0 meters/second.
The difference between speed and velocity is that, speed is a scalar quantity while velocity is a vector quantity.
Average speed = total distance/Total time
= (150 + 150) / (2×60)
= 300/120
= 2.5 m/s
Average velocity = Total displacement/ Total time
= (150 + -150) / (2 × 60)
= 0/120
= 0 m/s
