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Posted by: Mr. Babatunde« on: March 01, 2020, 12:26:57 PM »[Physics 3] Motion , Types , Causes Of Motion And Frictions (Solutions) 1. One of this is a causes of motion. A. Friction B. Forces ✔ C. Hitting D. Punching 2. _______ Involves a change of position of a body with time. A. Force B. Friction C. Motion ✔ D. Momentum 3. One of this is not a disadvantages of friction. A. It causes heating of engine B. It reduces motion C. It reduces the efficiency of machines D. It is made rough to cause slipping ✔ 4. When a body is placed over another, a force acts between the surface in contact and this force is called. A. Limitting friction ✔ B. Magnetic friction C. Static friction D. Solid friction 5. The type of motion in which a body moves in a non-linear manner and changes direction continuously. A. Rotational motion B. Relative motion C. Random motion ✔ D. Oscillatory motion 6. One of this is not an example of Rotational motion. A. Simple pendulum ✔ B. Car wheel C. Electric fan D. The earth 7. One of this is not a method of reducing friction A. Lubricating B. Banking C. Polishing D. Surface tension ✔ 8. When a force is attached to a string and whirled round at constant speed in a horizontal circle, the stone moves with same speed but at different directions and acceleration directed towards the centre of the circle due to the tension in the string that produces a force. The force required to keep this object (stone) moving in this circular part is. A. Contact force B. Centripetal force ✔ C. Force field D. Gravitational force 9. A motion in a circular path in which the speed of the body remains constant while its direction continuously changes is. A. Circular motion ✔ B. Linear motion C. Random motion D. Relative motion 10. One of this is not an example of oscillatory motion. A. Punching a bag B. Simple pendulum C. Vibration of pluncked guitar string D. Dashing of objects in air ✔
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