Question 1 unsaved a person covers a distance of 320 miles in a travel time of 8 hours. what is the speed for this trip? question 1 options: a. 40 mi/hr b. 20 mi/hr c. 35 mi/hr d. 15 mi/hr question 2 (10 points) question 2 unsaved a force of 15 n acts upon a 3 kg block. calculate the acceleration of the object. question 2 options: a. 75 m/s^2 b. 5 m/s^2 c. 45 m/s^2 d. 18 m/s^2 question 3 (10 points) question 3 unsaved the velocity of a car moving in a straight line increases from 8 m/s to 22 m/s in 7 seconds. what is the average acceleration of the car during this period? question 3 options: a. 2.3 m/s^2 b. 2.8 m/s^2 c. 1.8 m/s^2 d. 2.0 m/s^2 question 4 (10 points) question 4 unsaved newtons's first law states "acceleration depends on the mass of the object and the unbalanced force applied" question 4 options: true false question 5 (10 points) question 5 unsaved friction is a force that causes the speed of an object to increase. question 5 options: true false question 6 (10 points) question 6 unsaved mechanical advantage may be calculated using all of the following except question 6 options: a. counting the number of supporting ropes of a pulley system b. dividing resistance force by effort force c. multiplying resistance force by effort force d. dividing effort distance by resistance distance question 7 (10 points) question 7 unsaved in the case of a swinging pendulum, potential energy is greatest when question 7 options: a. the pendulum ball is at its highest points away from a surface. b. the pendulum ball is at its lowest point closest to a surface. c. the pendulum ball is midway between its highest and lowest points from the surface. d. none of the above question 8 (10 points) question 8 unsaved energy transferred by electromagnetic waves and that can travel through empty space is . question 8 options: a. convection b. conduction c. radiation d. induction question 9 (10 points) question 9 unsaved the use of an electric heater is an example of which energy transformations? question 9 options: a. chemical to electrical b. electrical to chemical c. thermal to electrical d. electrical to thermal question 10 (10 points) question 10 unsaved particles of matter are in constant motion and the higher the temperature, the faster they move. also, the smaller they are the faster they move. this statement describes . question 10 options: a. law of conservation of matter b. kinetic theory c. newtons third law d. law of conservation of energy