IB SL Physics Poorly Answered Questions 2
/A sheet with SL questions that are not well answered is given below.
- The average speed of a hydrogen atom at -23 °C is v. Determine the average speed of a helium atom at -148 °C. (v/√8)
- The increase in volume ∆V of a solid when it is heated is proportional to both its volume V and change in temperature ∆T. What is the SI unit for the constant of proportionality?
- The energy stored in a stretched spring is E. What is the work done in doubling the extension of the spring? (3E)
- A simple pendulum of mass m is oscillating through an angle of 40°. What is the magnitude of the resultant force acting on the mass at the top of its swing? (mgcos20)
- A car starts from rest and moves in a straight line with uniform acceleration a. Draw a graph showing the distance travelled every second versus the total time taken.(straight line, gradient a, y-intercept -a/2)
- On another planet a ball is released from rest and falls 2.0 m in the third second of its movement. What is the gravitational field strength of this planet? (0.8 N kg-1)
- A stationary firework of mass M explodes into pieces of mass 3M/4 and M/4. The kinetic energy of the smaller piece is E. What is the kinetic energy of the larger piece? (E/3)
- A car moves at a constant speed v around a circular track. What is the magnitude of the change in velocity of the car after travelling through an angle of 60°? (v)
