1. Motion & Kinematics
Q: A ball is thrown vertically upward with a speed of 20 m/s. How long will it take to reach the highest point? (Take g=10g = 10 m/s²)
A:
At the highest point, velocity v=0v = 0. Using the equation of motion:
Answer: 2 seconds
2. Work, Power, and Energy
Q: A force of 50 N is applied on a body of mass 5 kg. If the body moves 10 m in the direction of the force, what is the work done?
A:
Work done
3. Laws of Motion
Q: A 10 kg object is moving with an acceleration of 2 m/s². What is the net force acting on the object?
A:
Using Newton’s Second Law:
Answer: 20 Newtons
4. Current Electricity
Q: A resistor of resistance 5Ω is connected to a 10V battery. What is the current flowing through the resistor?
A:
Using Ohm’s Law:
Answer: 2 Amperes
5. Modern Physics
Q: The half-life of a radioactive substance is 6 hours. What fraction of the substance remains after 18 hours?
