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2 years ago

How could you increase the sliding friction between the sled and track? How could you decrease it?

Physics

2 answers:

Oksanka [162]2 years ago

7 0

Explanation:

<h2>If the normal force is the weight of objects you are sliding across the floor, adding or subtracting weight will increase or decrease the sliding friction. But also, if you are pulling an object with a rope, pulling at an upward angle will reduce the normal force.</h2>

Rudik [331]2 years ago

6 0

Answer:

You could put sheet metal lining the bottom or something similar to that

Explanation:

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3 years ago

A motorcyclist drove 7 km at 57km/h and then another 7 km at 81 km/h. What was the average speed?

alex41 [277]

Answer:

The average speed of the car is 66.9 km/h

Explanation:

Here distance covered with the speed 57 km/h=7 km 

distance covered with the speed of 81 km/h=7 km

Average speed is equal to the ratio of total distance to the total time.

total distance= 7 + 7= 14 km

$time= \frac{distance}{speed}$

time taken to cover the first 7 km= 7/57 h

time taken to cover the second part of the journey = 7/81 h

average speed = $14/(7/57+7/81)=(14 \times 57 \times 81)/945=66.9 km/h$ 

Shortcut: 

When equal distances are covered with different speeds average speed=2 ab/(a+b) where a and b are the variable speeds in the phases. 

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3 years ago

How could you increase the sliding friction between the sled and track? How could you decrease it?​

How could you increase the sliding friction between the sled and track? How could you decrease it?