A 2 kg crate on a rough horizontal floor is pushed by a horizontal force of 30 N. The coefficient of kinetic friction is 0.3. Taking m/s, find the acceleration.
Answer and explanation
Correct answer: B. 12.06 m/s
- Step 1: Friction N.
- Step 2: m/s.
Answer
12.06 m/s.
Why not the others: 15 m/s: friction is ignored. 17.94 m/s: friction is added instead of subtracted. 24.12 m/s: the net force is not divided by the mass.
Practise more Mechanics.
Free questions with an explanation for every one, and full timed General Education Diploma (GED Oman) mock tests.
More Mechanics questions
- A stone is thrown horizontally at 5 m/s from a cliff 19.6 m high. Taking m/s, how far from the base of the cliff does it land?
- A 2 kg crate on a rough horizontal floor is pushed by a horizontal force of 40 N. The coefficient of kinetic friction is 0.25. Taking…
- A 5 kg crate on a rough horizontal floor is pushed by a horizontal force of 30 N. The coefficient of kinetic friction is 0.2. Taking…
- A 4 kg crate on a rough horizontal floor is pushed by a horizontal force of 50 N. The coefficient of kinetic friction is 0.25. Taking…
- A 4 kg object moves in a horizontal circle of radius 0.5 m at a constant speed of 6 m/s. What is the centripetal force acting on it?
- A 2 kg object moves in a horizontal circle of radius 2 m at a constant speed of 5 m/s. What is the centripetal force acting on it?