- #1

Shah 72

MHB

- 274

- 0

You are using an out of date browser. It may not display this or other websites correctly.

You should upgrade or use an alternative browser.

You should upgrade or use an alternative browser.

In summary, a snooker ball of mass 0.4kg is struck towards a cushion from 0.8m away with speed 3m/s. The surface of the snooker table has a coefficient of friction of 0.3. When the ball bounces from the cushion its speed is reduced by 20%.

- #1

Shah 72

MHB

- 274

- 0

Mathematics news on Phys.org

- #2

skeeter

- 1,103

- 1

show your work on this problem, please

- #3

HOI

- 921

- 2

- #4

Shah 72

MHB

- 274

- 0

m=0.4kg, u=3m/s, coefficient of friction =0.3skeeter said:show your work on this problem, please

By using Newtons law

F=m×a

-0.3×4=0.4a

a=-3m/s^2,

By using v^2=u^2+2as, v=2.05m/s when the ball hits the cushion

The speed decreases by 20%, so 2.05×0.8=1.64m/s. Again using v^2=u^2+2as, I get s=0.25m

- #5

Shah 72

MHB

- 274

- 0

Oh sorry I had done a silly mistake. So initial velocity is 3 and when it hits the cushion, the final velocity is 2.05 m/s , this is reduced by 20% so now u= 1.64 m/s and v=0 ( as the ball stops) so the distance will be 0.448mskeeter said:show your work on this problem, please

- #6

Shah 72

MHB

- 274

- 0

Thanks! I could work out the solution.Country Boy said:rollswith only a slight amount of sliding. The coefficient of friction only applies to the sliding. To answer this you would have to know what part of the motion was sliding and I see no way to determine that.

- #7

HOI

- 921

- 2

I am glad. How did you handle the "rolling versus sliding" problem?

- #8

Shah 72

MHB

- 274

- 0

I just guessed rolling. Iam still in A levels so probably my textbook doesn't get into so much detail.Country Boy said:I am glad. How did you handle the "rolling versus sliding" problem?

- #9

HOI

- 921

- 2

If there were pure rolling, there would be NO friction!

- #10

Shah 72

MHB

- 274

- 0

Yeah you are right.Country Boy said:If there were pure rolling, there would be NO friction!

Friction is a force that resists the motion of two surfaces that are in contact with each other.

Friction affects snooker balls by slowing them down as they roll across the table, making them come to a stop.

The amount of friction on a snooker ball is affected by the weight of the ball, the type and condition of the table surface, and the force applied to the ball.

The mass and speed of a snooker ball can be calculated by using the formula F = m x a, where F is the force of friction, m is the mass of the ball, and a is the acceleration due to friction. By measuring the force of friction and the acceleration, the mass and speed of the ball can be determined.

Friction can be reduced on a snooker table by using a smoother and cleaner table surface, reducing the weight of the balls, and using a lubricant or powder on the table.

- Replies
- 6

- Views
- 1K

- Replies
- 4

- Views
- 945

- Replies
- 5

- Views
- 2K

- Replies
- 1

- Views
- 809

- Replies
- 2

- Views
- 2K

- Replies
- 5

- Views
- 1K

- Replies
- 2

- Views
- 997

- Replies
- 8

- Views
- 997

- Replies
- 5

- Views
- 937

- Replies
- 14

- Views
- 2K

Share: