Calculus based physics problem. (energy and fricition)

AI Thread Summary
The problem involves a 3.8 kg block sliding on a frictionless track before encountering friction at a higher level. The initial speed of the block is 6.9 m/s, and it experiences a height difference of 1.2 m with a coefficient of kinetic friction of 0.649. Energy transferred to thermal energy is calculated as 45.771 J, with a normal force of 37.24 N and kinetic energy due to friction at 24.168 J. To find the distance d that the block travels before stopping, the work-energy principle can be applied using the equation W = fd, where W represents the work done by friction. The discussion focuses on how to effectively use the calculated values to solve for d.
oohaysomeone
Messages
2
Reaction score
0
In the figure, a 3.8 kg block slides along a track from one level to a higher level after passing through an intermediate valley (frictionless). The track is frictionless until the block reaches the higher level. There a frictional force stops the block in a distance d. The block's initial speed is v0 = 6.9 m/s, the height difference is h = 1.2 m, and μk = 0.649. Find d.

i've already found that energy transferred to thermal energy is 45.771 J, the normal force = 37.24 and the KE frictional force = 24.168 J but I'm not sure what to do with these numbers.
 
Physics news on Phys.org
I think you use W = fd. But, I'm not sure how.
 
Thread 'Voltmeter readings for this circuit with switches'

Thread 'Voltmeter readings for this circuit with switches'

TL;DR Summary: I would like to know the voltmeter readings on the two resistors separately in the picture in the following cases , When one of the keys is closed When both of them are opened (Knowing that the battery has negligible internal resistance) My thoughts for the first case , one of them must be 12 volt while the other is 0 The second case we'll I think both voltmeter readings should be 12 volt since they are both parallel to the battery and they involve the key within what the...
View full post »
Thread 'Correct statement about a reservoir with an outlet pipe'

Thread 'Correct statement about a reservoir with an outlet pipe'

The answer to this question is statements (ii) and (iv) are correct. (i) This is FALSE because the speed of water in the tap is greater than speed at the water surface (ii) I don't even understand this statement. What does the "seal" part have to do with water flowing out? Won't the water still flow out through the tap until the tank is empty whether the reservoir is sealed or not? (iii) In my opinion, this statement would be correct. Increasing the gravitational potential energy of the...
View full post »

Similar threads

Work & Energy (Question on Classical Mechanics/Slope based Problems)
Replies
7
Views
2K
Work Pulley Problem with constant speed
Replies
2
Views
1K
Elastic potential energy (spring) problem
Replies
3
Views
2K
I need opinions on a Projectile Motion problem that I made up
Replies
11
Views
2K
First post: work and energy problem
Replies
5
Views
2K
Sliding block Kinetic Energy Problem
Replies
7
Views
8K
A problem about Work and Energy :(
Replies
1
Views
1K
Calculus based physics - Energy
Replies
1
Views
3K
Understanding Work and Energy: Solving a Physics Problem with a Spring
Replies
2
Views
1K
What is the change in potential energy of two blocks in a physics problem?
Replies
12
Views
2K

Hot Threads

Recent Insights

Back
Top