- 1. Achild pulls on a 6.5 kg sled with a net force of 14.2 N.Determine the sled's rate of acceleration.
- c) A melting point test of 10 samples of a binder used in manufacturing a rock propellant resulted in bar (x)=154.2^circ F Assume that the melting point is normally distributed with d^2=1.5 Test H;mu =155 verses Ho; mu neq 155 at 0.01 level of significance (8 marks)
- 1. An object that is 4.0 cm high and is placed 50 cm in front of a magnifying mirror with a radius of curvature of 20.0 cm. (11 marks). a. Calculate the focal length of the mirror. R=2F 20=2F 10=F 10cm b. Using formulas from this lesson, calculate: i The image location. ii. The magnification of the image. c. State two characteristics of the image that is produced.
- 1. A student strikes a tennis ball that is initially at rest so that it leaves the racquet at a speed of 64ms^-1 The ball has a mass of 0.058 kg and the contact between the ball and the racquet lasts for 25 ms. a. Calculate: i. the average force exerted by the racquet on the ball ii. the average power delivered to the ball during the impact.
- 1. An object that is 4.0 cm high and is placed 5 .0 cm in front of a magnifying mirror with a radius of curvature of 20.0 cm. (11 marks). a. Calculate the focal length of the mirror. Triple click this text to highlight it and replace It with your answer.DO NOT BACKSPACE.
