Browse Moments

86 questions at your level

DifficultyAll Level 2 Level 3 Level 4 Level 5

Moments of forces

59 questions

LessonNot started

Figure 1

A uniform ladder

AB

5

336

N, rests with its end

A

on rough horizontal ground and its end

B

against a smooth vertical wall. The ladder lies in a vertical plane perpendicular to the wall and makes an angle

\theta

with the ground, where

\tan\theta = \frac{24}{7}

, as shown in Figure 1.

By taking moments about

A

, find the magnitude of the normal reaction of the wall on the ladder.

(3 marks)

●●●●●Level 23 marksStart

Figure 1

A uniform rod

AB

3

80

N, rests with its end

A

on rough horizontal ground and against a small smooth horizontal peg at

C

AC = 2.4

m. The rod lies in a vertical plane perpendicular to the peg and is inclined at

25^\circ

to the horizontal, as shown in Figure 1.

Find, to 3 significant figures, the magnitude of the force exerted on the rod by the peg.

(3 marks)

●●●●●Level 23 marksStart

25

N acts at a perpendicular distance of

0.4

m from a pivot. Find its moment about the pivot.

●●●●●Level 22 marksStart

A light rod is pivoted at its centre. A

6

N force acts downward

2

m to the left of the pivot, and an

8

N force acts downward

1.5

m to the right. Find the resultant moment about the pivot.

●●●●●Level 22 marksStart

15

N acts at a perpendicular distance of

3

m from a pivot, turning it clockwise. State the moment of the force.

●●●●●Level 22 marksStart

A light rod is pivoted at a point

O

8

N acts vertically downward at a point

1.5

m to the left of

O

F

acts vertically downward

2

m to the right of

O

. The rod is in equilibrium.

Find

F

●●●●●Level 23 marksStart

Equilibrium of rigid bodies

38 questions

LessonNot started

AB

6

200

N rests on supports at

A

B

. Find the reactions at

A

B

●●●●●Level 22 marksStart