Soccer - What was the impulse on the soccer ball

In summary, a 0.40 kg soccer ball with a velocity of 18 m/s to the north was struck by a player, causing it to move in the opposite direction with a velocity of 24 m/s. The impulse delivered to the ball by the player can be calculated using the equation M(v)f-M(v)i=impulse, which results in -42 kg · m/s. The key to solving this problem is considering the direction of the velocities.
  • #1
gansta344u
25
0

Homework Statement


A 0.40 kg soccer ball approaches a player
horizontally with a velocity of 18 m/s to the
north. The player strikes the ball and causes
it to move in the opposite direction with a
velocity of 24 m/s.
What impulse was delivered to the ball by
the player? Answer in units of kg · m/s.

2. Homework Equations
M(v)f-M(v)i=impulse

The Attempt at a Solution


i did (.4kg)(24m/s)-(.4kg)(18m/s) and i got it wrong so if u can please help
 
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  • #2


gansta344u said:

Homework Statement


A 0.40 kg soccer ball approaches a player
horizontally with a velocity of 18 m/s to the
north. The player strikes the ball and causes
it to move in the opposite direction with a
velocity of 24 m/s.
What impulse was delivered to the ball by
the player? Answer in units of kg · m/s.

2. Homework Equations
M(v)f-M(v)i=impulse

The Attempt at a Solution


i did (.4kg)(24m/s)-(.4kg)(18m/s) and i got it wrong so if u can please help


The key here is direction.

If it comes in at 18m/s and reverses then it returns at -24m/s.

-24 - 18 = -42
 
  • #3


The key to this is directions. Choose one and then all velocities are either positive or negative relative to that. Does that help?

The Bob

P.S. It's not my night; second after post, apologies once again.
 
Last edited:

1. What is the impulse on a soccer ball?

The impulse on a soccer ball is the product of the force applied to the ball and the time it is in contact with the foot or any other surface. It is a measure of the change in momentum of the ball.

2. How is impulse related to the movement of a soccer ball?

Impulse is directly related to the movement of a soccer ball. The greater the impulse, the more the ball's momentum changes, resulting in a greater change in velocity and direction of the ball.

3. What factors affect the impulse on a soccer ball?

The factors that affect the impulse on a soccer ball include the force applied to the ball, the angle and surface of contact, and the time the ball is in contact with the surface. Other factors such as air resistance and spin can also affect the impulse.

4. How can the impulse on a soccer ball be calculated?

The impulse on a soccer ball can be calculated using the formula Impulse = Force x Time. The force can be measured using a force plate or by analyzing the velocity and mass of the ball before and after the kick. The time can be measured using high-speed cameras or by measuring the duration of contact between the ball and foot.

5. Can the impulse on a soccer ball be increased?

Yes, the impulse on a soccer ball can be increased by increasing the force applied, increasing the angle of contact, or increasing the time the ball is in contact with the foot or surface. Proper technique and timing can also help to increase the impulse on a soccer ball.

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