A hiker hikes in a straight line and maintains a constant velocity of +0.5 m/s. At time t=0.0 s, the hiker is 30 m from point A. What is the displacement from point A at 120 s?
a.
60 m
c.
120 m
b.
90 m
d.
15 m
To find the displacement from point A at 120 s, we can use the equation:
displacement = velocity x time
Given that the hiker has a constant velocity of +0.5 m/s, and the time is 120 s, we can substitute these values into the equation:
displacement = 0.5 m/s * 120 s
Simplifying the equation:
displacement = 60 m
Therefore, the correct answer is:
a) 60 m
To find the displacement from point A at 120 s, we can use the formula:
Displacement = Initial Position + Velocity * Time
Given that the hiker maintains a constant velocity of +0.5 m/s, we can substitute the values into the formula:
Displacement = 30 m + (0.5 m/s) * 120 s
Calculating this expression:
Displacement = 30 m + 60 m
Displacement = 90 m
The correct answer is option b. 90 m.