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Q12: You pull a box with a mass of 100 kg across a rough surtac using a rope, applying concrete) and the horizontal force. The static friction coeffcient is 1.0 (e.g kinetic friction coefficient is 0.8 (a) (8 pts] Which is the minimum force needed to make the box alternatively, the maximum force that can be applied before it starts start moving (or moving)? (b) 18 pts] if you continue to apply the same force once the box s starts moving, which will the acceleration be? t (force) that exceeds the weight. With half fuel and no other load, the plane weighs 18 tons (1 ton·1000 (12 pts) If the pilot applies a 180,000 N vertical force, how long will it take the plane to reach an altitude of 100 feet (1 foot- 0.3048 m)?
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