- 4. Find the displacement from position 1, Delta overrightarrow (d)_(1)=+45cm to position 2, Delta overrightarrow (d)_(2)=+33cm (3) Draw a picture for full marks The displacement is from 1-to nosition 2 is +78cm
- 3. Four materials (A ,B,C,D) have indices of refraction of 1.72,1.00,2.30 and 1.50 respectively. Which material will refract (bend) light the most? Why? (2 marks)
- 6. Describe the resultant effect (attraction or repulsion) of the fol i) A negatively charged rod is brought CLOSE to a neutral pith ball. ii) A negatively charged rod is brought CLOSE to a negative pith bal iii) A negatively charged rod is brought CLOSE to a positive pith bal iv) A negative rod TOUCHES a neutral pith ball. v) A positive rod TOUCHES a neutral pith ball.
- 3. Draw a scale diagram for these vectors and give a resultant vector 3.5mW4.2mN 7.1kmS8.6kmE
- 33) The scientist responsible for demonstrating that heat and light can be produced by electricity was A) Thomas Seebeck. C) Michael Faraday B) Thomas Edison. D) Hans Oersted 39) Flowing water has A) kinetic energy due to its position. B) potential energy due to its position. C) potential energy due to its motion. D) kinetic energy due to its motion. 40) A cheerleader standing at the top of a human pyramid has 3.01 k) of gravitational potential energy. If the cheerleader is 4.50 m above the surface of the earth, her mass must be A) 669 kg. B) 68.2 kg C) 307 kg. D) 14.7 kg. 41) The manipulated equation listed below that will determine the height of an object given its mass and potential energy is A) H=E_(p)times m/g B) H=E_(p)times g/m C) H=mg/E_(p) D) H=E_(p)/mg 42) A soccer ball is kicked straight up.While it rises and falls, its potential energy A) decreases then increases. B) decreases then remains constant. C) increases then decreases. D) increases then remains constant. 43) The weight of a 45.0-kg object is A) 45 N. B) 312 N C) 2025 N. D) 441 N. 44) A golf ball leaving the tee has a kinetic energy of 110 J and a velocity of 70m/s The mass of the golf ball is A) 0.011 kg. B) 0.045 kg. C) 3.1 kg D) 1.6 kg. 45) The kinetic energy of an NHL hockey player is 4.50 kJ.If the player has a mass of 114 kg, his speed is A) 6.28m/s B) 19.7m/s C) 78.9m/s D) 8.89m/s. 46) A 0.547 kg pizza crust is thrown straight up in the air.Ata height of 2.30 m above the surface of Earth it has a speed of 5.00m/s The total mechanical energy of the pizza a ust is A) 12.3 J. B) 5.50 ] C) 19.2 J. D) 6.84] 47) A45.0ggolf ball is released 2.50 m above the ground. The velocity of the golf ball when it hits the ground is A) 3.50m/s B) 49.0m/s C) 7.00m/s D) 12.3m/s 38) 39) 41) 42) 43
