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1.

A 2 kg body on rough horizontal ground (μ = 0.25) is pulled by 50 N at 20° above the horizontal as shown. Find its acceleration (g = 9.8).

22.550 m/s²

21.042 m/s²

23.492 m/s²

23.180 m/s²

2.

A 8 kg body on rough horizontal ground (μ = 0.5) is pulled by 100 N at 20° above the horizontal as shown. Find its acceleration (g = 9.8).

6.846 m/s²

7.600 m/s²

8.984 m/s²

11.746 m/s²

3.

A 4 kg body on rough horizontal ground (μ = 0.5) is pulled by 30 N at 20° above the horizontal as shown. Find its acceleration (g = 9.8).

7.048 m/s²

2.148 m/s²

2.600 m/s²

3.430 m/s²

Lesson 1: Equilibrium of a Particle, Friction and Limiting Static Friction — Picture questions (exam style)