Chapter 1 Laws of Motion
Top questions
See all →- Take 5 examples from your surroundings and give explanation based on Newton's law of motion 1) When a ball is kicked in space, the ball keeps moving in one direction as there is no gravity. The ball stops when it hits an object or p... 1
- Does the angle of banking depend on the mass of the vehicle? It does not depends upon mass of the vehicle as it only depends upon:- 1.acceleration due to gravity 2.radius of curvature 3.speed of the ve... 1
- A person swims 100 m in the first 40 s, 80 m in the next 40 s and 45 m in the last 20 s. What is the average speed? formula for velocity is given as; v=x/t therefore, v₁=x₁/t₁=100m/40sec=2.5m/s. v₂=x₂/t₂=80m/40sec=2m/s v₃=x₃/t₃=45m/20sec=2.25m/s Vavg=V1+V2... 2
- A bullet having a mass of 10 g and moving with a speed of 1.5 m/s, penetrates a thick wooden plank of mass 90 g. Answer: 0.15 m/s Use the law of conservation of momentum: total momentum before = total momentum after. Convert masses to kg: bullet m₁ = 10... 1
- An object of mass 16 kg is moving with an acceleration of 3 m/s2 . Calculate the applied force. Answer: Force = 48 N; acceleration of the 24 kg object = 2 m/s² By Newton's second law, F = ma . For the 16 kg object: F = 16\ kg × 3\ m/s²... 1
- An object moves 18 m in the first 3 s, 22 m in the next 3 s and 14 m in the last 3 s. What is its average speed? Average speed = Total \ Distance/Total \ time = 18+22+14/3+3+3=54/9 =6m/s 1