What is KINEMATICS? 1. What is the SI unit of displacement? Second (s) Meter (m) Kilometer (km) Minute (min) 2. What is the difference between distance and displacement? Distance is the rate of change of velocity of an object with respect to time while displacement is the rate of change of position of an object. Distance is in a particular direction while displacement is not. Distance is a vector quantity while displacement is a scalar quantity. Distance is a scalar quantity while displacement is a vector quantity. 3. What is speed? The total length covered by a moving body without mentioning direction of motion. The distance measured in a straight line in a particular direction. The rate of change of velocity of an object with respect to time. The rate of change of position of an object. 4. What is the formula for average speed? Speed = distance travelled/time taken Speed = change in position/time taken Acceleration = change in velocity/time taken Velocity = change in displacement/time taken 5. What is velocity? The rate of change of velocity of an object with respect to time. The rate of change of position of an object. The total length covered by a moving body without mentioning direction of motion. The distance measured in a straight line in a particular direction. 6. What is the formula for velocity? Speed = distance travelled/time taken Speed = change in position/time taken Velocity = change in displacement/time taken Acceleration = change in velocity/time taken 7. What is the SI unit of velocity? Kilometer (km) Meter (m) Meter per second (m/s) Minute (min) 8. What is uniform speed? An object covers an equal displacement in equal intervals of time. An object covers a changing distance in equal intervals of time. An object covers a changing displacement in equal intervals of time. An object covers an equal distance in equal intervals of time. 9. What is the difference between speed and velocity? Speed and velocity are the same. None of them Velocity is a scalar quantity while speed is a vector quantity. Speed is a scalar quantity while velocity is a vector quantity. 10. What is the SI unit of acceleration? kg m ms-2 ms-1 11. What causes acceleration? Change in velocity. Change in direction. All of them Change in speed. 12. What is the direction of positive acceleration? In the direction of velocity. None of them Opposite to the direction of velocity. Perpendicular to the direction of velocity. 13. What is deceleration? Negative acceleration. Positive acceleration. None of them No change in acceleration. Loading … Pages: 1 2 3 4
