Pulley is smooth, string light and inextensible.

T is the tension in the string.

Think about the forces involved and the direction of the acceleration.

Which set of equations is correct?

• T – 5g = 0

  9g – T = 9a

• 5g – T = 5a

  T – 9g = 9a

• 9g – T = 9a

  T – 5g = 5a

Now find a and T.

Separate your answers with a comma, never use more than 1 space between things. DON'T TYPE UNITS, RECORD ALL D.P.

Pulley is smooth, string light and inextensible.

Which set of equations icorrect?

• T – 7g - 5g = 12a

  9g – T = 9a

• T – 7g = 5a

  9g – T = 9a

• 9g – T = 9a

  T – 7g = 7a

T – 7g = 5a

9g – T = 9a

Now find a and T.

Separate your answers with a comma, never use more than 1 space between things. DON'T TYPE UNITS, RECORD ALL D.P.

Pulley is smooth, string light and inextensible.

Which two equations apply to this system?

• 7g – T = 7a

• 9g – T = 9a

• 9g – T = 14a

• T – 5g = 7a

• T – 5g = 5a

9g – T = 9a

T – 5g = 7a

Now find a and T.

RECORD ALL D.P.

Which equations are true for this system?

(Think about the direction of the acceleration)

• 7g – T = 7a

• 9g – T = 12a

• T – 4g = 5a

• 9g – T = 7a

• 3g = 12a

7g – T = 7a

T – 4g = 5a

3g = 12a

Now find a and T. RECORD ALL D.P.

Which 3 equations are true for this system?

(Think about the direction of the acceleration)

• 9g – T = 9a

• S – 7g = 7a

• T – S = 12a

• 7g – S = 7a

• S – T = 12a

Now find a, T and S.

RECORD YOUR ANSWERS IN THIS ORDER!