Answer:
0.882 m/s average velocity and 1.71 m/s average speed
Explanation:
The dog travels a total of 35 m west and 110 m east.
110-35 = 75 m east of the starting position. Since velocity is a vector you must consider its first and final position and not the total distance traveled.
75 m / 85 s = 0.882 m/s average velocity
Speed is not concerned with direction so we instead add the total distance traveled which is 35+110 = 145 m. We then perform the same operation as before and divide by the time it took to run this distance.
145 m / 85 s = 1.71 m/s average speed
The total distance traveled by Aliaa using her skateboard for 20 revolution of the wheels is equal to 3770 millimeters.
<u>Given the following data:</u>
Diameter of skateboard = 60 mm.
Number of revolution = 20 revolutions.
Radius = diameter/2 = 60/2 = 30 mm.
<h3>What is distance?</h3>
Distance can be defined as the amount of ground covered (traveled) by a physical object over a specific period of time and speed, regardless of its direction, starting point or ending point.
For one revolution of the wheels, the distance traveled by Aliaa using her skateboard is given by:
Distance = 2πr
Distance = 2 × 3.142 × 30
Distance = 188.5 mm.
Therefore, the total distance traveled by Aliaa using her skateboard for 20 revolution of the wheels is given by:
Distance = 188.5 × 20
Distance = 3770 millimeters.
Read more on distance per revolutions here: brainly.com/question/10989073
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Answer:
The acceleration and time are 588 m/s² and 0.071 sec respectively.
Explanation:
Given that,
Speed = 42.0 m/s
Distance = 1.50 m
(a). We need to calculate the acceleration
Using equation of motion
Put the value in the equation
(b). We need to calculate the time
Using equation of motion
Hence, The acceleration and time are 588 m/s² and 0.071 sec respectively.
8.6 cm
Explanation:
Step 1:
In this we have to find the focal length of converging lens.
To find focal length we have,
where u = Object distance
v= Image distance
f = Focal length
Step 2:
(1/f) = 0.116
f = 1/0.116
f = 8.6 cm
