Forces and equilibrium in everyday life FiniteQuest

Forces and equilibrium

1 / 10

A beam is balanced on a fulcrum. If a 10 kg mass is placed 2 m from the fulcrum, where should a 20 kg mass be placed to maintain equilibrium?

2.5 m

0.5 m

2 / 10

A 50 kg person pushes a wall with a force of 200 N. What is the force exerted by the wall on the person?

50 N

100 N

200 N

0 N

3 / 10

A 5 kg block rests on a surface with a coefficient of static friction µs = 0.4. What is the maximum horizontal force that can be applied before the block starts to move?

10 N

15 N

20 N

25 N

4 / 10

A ladder of mass 20 kg is leaning against a smooth wall at an angle of 60° to the horizontal. What is the force of friction acting on the ladder at the base?

49 N

98 N

169.7 N

196 N

5 / 10

Two forces of 50 N and 120 N act at an angle of 60° to each other. What is the magnitude of the resultant force?

140 N

130 N

100 N

90 N

6 / 10

A uniform rod of length 4 m and weight 40 N is pivoted at one end and held horizontally by a string attached 3 m from the pivot. What is the tension in the string?

10 N

30 N

40 N

20 N

7 / 10

A car of mass 1500 kg is parked on an incline of 30°. What is the force of static friction preventing the car from sliding down?

7350 N

6375 N

5500 N

4900 N

8 / 10

A 10 kg object is suspended by two ropes making 30° and 60° angles with the ceiling. What is the tension in the rope at 60°?

49 N

56.6 N

98 N

113.2 N

9 / 10

A block is pushed with a horizontal force of 40 N on a rough surface with a coefficient of kinetic friction µk = 0.2. If the block’s mass is 10 kg, what is the acceleration of the block?

1.6 m/s²

2.0 m/s²

2.4 m/s²

3.0 m/s²

10 / 10

A uniform beam of weight 300 N is supported horizontally at its ends. If a 100 N weight is placed 2 m from one end, what is the reaction force at the farther end?

150 N

200 N

250 N

300 N

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