Answer: 24.7 km/h
Explanation:
1) Average speed definition and formula
The average speed is the total distance run divided by the time elapsed:
S = distance / time
2) Distance 1 = 67 km
3) Distance 2 = 81 km
4) Total distance traveled = 67 km + 81 km = 148 km
5) time 1 = 1 hour
6) time 2 = 5 hours
7) total time = time 1 + time 2 = 1 h + 5 h = 6 h
8) Average speed:
S = 148 km / 6 h = 24.7 km/h
Electromagnets can be turned off, this makes it easier to release things from the magnetic field.
Hope this helps :)
Answer:
4.8 mph
Explanation:
From the question,
Average speed = total distance/total time
V = d/t....................... Equation 1
Where d = distance, t = time
Given: d = 26.2 miles, t = 5.5 hours.
Substitute these values into equation 1
V = 26.2/5.5
V = 4.76 mph
V ≈ 4.8 mph
Answer:
The minimum force is required is, f = 0.3 mg Newton
Explanation:
Given data,
The coefficient of the static friction, μₓ = 0.3
Let the mass of the wheel is, m = M kg
The minimum force required to set the wheel in motion is equal to the force of static friction. This amount of force can be applied tangentially to the wheel in a vertical direction to set the wheel in motion.
<em> Fₓ = μₓ. F</em>
Where F is the normal force acting on the wheel and it is equal to mg.
Therefore, the minimum force is required is, f = 0.3 mg Newton
Answer: the awnser is 19k
Explanation:
