Distance-Time and Speed-Time Graphs Distance-Time Graphs 1. How do you judge if an object is moving quickly or slowly on a distance-time graph? _________________________________________________________________________________________________ 2. Look at the distance-time graph for a woman walking below. a) Between 0s and 10s is the woman accelerating? Yes / No (circle one) b) Between 10s and 40s is the woman accelerating? Yes / No (circle one) c) Is the woman moving fastest between 0 and 10s, or 10s and 40s? 0 & 10s / 10s & 40s (circle one) You can check if you are correct by calculating the gradient of a line. This tells us the speed. d) Work out the speed between 0 and 5s by creating a triangle under the line to calculate the gradient. _________________________________________________________________________________________________ Now, work out the speed between 5 and 10s by creating a triangle under the line to calculate the gradient. _________________________________________________________________________________________________ If your answers are the same, the object was moving at a constant speed between 0 and 10s. If the answers were different, the object will be accelerating or decelerating. Was the object moving at a constant speed or accelerating/ decelerating between 0 and 10s? Constant speed Accelerating/ Decelerating (circle one) e) Work out the speed between 10s and 20s by creating a triangle under the line to calculate the gradient. _________________________________________________________________________________________________ Now, work out the speed between 30s and 40s by creating a triangle under the line to calculate the gradient. _________________________________________________________________________________________________ If your answers are the same, the object was moving at a constant speed between 10 and 40s. If the answers were different, the object will be accelerating or decelerating. Was the object moving at a constant speed or accelerating/ decelerating between 10 and 40s? Constant speed f) Accelerating/ Decelerating (circle one) You have worked out speed from 0-10s and 10-40s. Look back at your answers to 2(a) and 2(b). Were you correct or incorrect? If you were incorrect, explain why you got it wrong. If you were correct, explain what mistakes other people could make to get the answer incorrect. _________________________________________________________________________________________________ _________________________________________________________________________________________________ _________________________________________________________________________________________________ _________________________________________________________________________________________________ _________________________________________________________________________________________________ Speed-Time Graphs 3. How do you judge if an object is moving quickly or slowly on a speed-time graph? _________________________________________________________________________________________________ 4. Look at the speed-time graph for a woman walking below. a) Between 0s and 10s is the woman travelling at a constant speed? Yes / No (circle one) b) Between 10s and 40s is the woman travelling at a constant speed? Yes / No (circle one) c) Is the woman moving fastest between 0 and 10s, or 10s and 40s? 0 & 10s / 10s & 40s (circle one) You can check if you are correct by calculating the gradient of a line. This tells us the acceleration. d) Work out the acceleration between 0 and 10s by creating a triangle under the line to calculate the gradient. _________________________________________________________________________________________________ Was the object moving at a constant speed or accelerating/ decelerating between 0 and 10s? Constant speed Accelerating (circle one) e) Work out the acceleration between 10s and 40s by creating a triangle under the line to calculate the gradient. _________________________________________________________________________________________________ Was the object moving at a constant speed or accelerating/ decelerating between 10 and 40s? Constant speed f) Accelerating/ Decelerating (circle one) You have worked out acceleration from 0-10s and 10-40s. Look back at your answers to 4(a) and 4(b). Were you correct or incorrect? If you were incorrect, explain why you got it wrong. If you were correct, explain what mistakes other people could make to get the answer incorrect. _________________________________________________________________________________________________ _________________________________________________________________________________________________ _________________________________________________________________________________________________ _________________________________________________________________________________________________ _________________________________________________________________________________________________ Harder Questions – Distance-Time Graph 5. How do you judge if an object is moving accelerating on a distance-time graph? _________________________________________________________________________________________________ 6. Look at the speed-time graph for a car below. a) Between 0s and 15s is the woman travelling at a constant speed? Yes / No (circle one) You can check if you are correct by calculating the gradient of a line. This tells us the acceleration. b) Work out the acceleration at 5s by drawing a tangent and creating a triangle under the line to calculate the gradient. _________________________________________________________________________________________________ c) Work out the acceleration at 12s by drawing a tangent and creating a triangle under the line to calculate the gradient. _________________________________________________________________________________________________ If your answers are the same, the object was moving at a constant speed between 0 and 15s. If the answers were different, the object will be accelerating or decelerating. Was the object moving at a constant speed or accelerating/ decelerating between 0 and 15s? Constant speed Accelerating (circle one) d) How do you judge if an object is accelerating on a distance-time graph? _________________________________________________________________________________________________ _________________________________________________________________________________________________ _________________________________________________________________________________________________ _________________________________________________________________________________________________ _________________________________________________________________________________________________ Harder Questions – Velocity-Time Graph 7. What is the difference between speed and velocity? _________________________________________________________________________________________________ _________________________________________________________________________________________________ 8. Look at the velocity-time graph below. Describe the motion in the graph. _________________________________________________________________________________________________ _________________________________________________________________________________________________ _________________________________________________________________________________________________ _________________________________________________________________________________________________ _________________________________________________________________________________________________ _________________________________________________________________________________________________ _________________________________________________________________________________________________ _________________________________________________________________________________________________ _________________________________________________________________________________________________
