Physics Grade 9 iGCSE- Forces and Moment

Four objects are each acted on by only two forces, as shown. Which object is in equilibrium?

• A

• B

• C

• D

The diagram shows an object of weight W and an object of weight Z balanced on a uniform metre rule. Which equation relating to W, Z, a and b is correct?

• $\frac{W}{a}=\frac{Z}{b}$

• $W\times Z=a\times b$

• $W\times a=Z\times b$

• $W\times\left(a+b\right)=Z$

Five identical bags of rice are balanced on a uniform beam by an object of mass 10kg. Two more identical bags of rice are added to the other five. The average position of the bags on the beam does not change. What mass now balances the bags?

• 3.5kg

• 7.0kg

• 12kg

• 14kg

The diagram shows an unbalanced rod. Two loads X and Y can be moved along the rod. The rod turns in a clockwise direction as shown. Which action could make the rod balance?

• moving X to the left

• moving X to the right

• moving Y to the right

• moving the pivot to the left

The diagram shows a uniform beam being used as a balance. The beam is pivoted at its centre. A 1.0N weight is attached to one end of the beam. An empty pan weighing 0.2N is attached to the other end of the beam. How many 0.1N weights must be placed on the pan in order to balance the beam?

• 5

• 8

• 10

• 12

Question on the figure above!

• A

• B

• C

• D

Question on the figure above!

• A

• B

• C

• D

Question on the figure above

• A

• B

• C

• D

Question on figure above!

• A

• B

• C

• D

Question on the figure above

• A

• B

• C

• D