Question

2. Speed-Time Graphs Look at the speed-time graph/ velocity – time graph for a woman walking below along a straight line path. i. Between 0s and 10s is the woman travelling at a constant speed? Yes / No ii. Between 10s and 40s is the woman travelling at a constant speed? Yes / No iii. Is the woman moving fastest between 0 and 10s, or 10s and 40s? 0 & 10s / 10s & 40s iv. Work out the acceleration between 0 and 10s by creating a triangle under the line to calculate the gradient. v. Was the object moving at a constant speed or accelerating/ decelerating between 0 and 10s? vi. Work out the acceleration between 10s and 40s by creating a triangle under the line to calculate the gradient. vii. Was the object moving at a constant speed or accelerating/ decelerating between 10 and 40s?

Answer 1

Answer:

The principle is that the slope of the line on a velocity-time graph reveals useful information about the acceleration of the object. If the acceleration is zero, then the slope is zero (i.e., a horizontal line). ... If the acceleration is negative, then the slope is negative (i.e., a downward sloping line).

Answer 2

1. yes
2. no
3. 0 and 10
5. constant
7. accelerated then deaccelerated