John and Caroline go out for a walk one day. This graph represents their distance from home.Which statement accurately describes
their walk?
They walked uphill quickly, then they were still, then they walked downhill slowly.
They walked faster and faster until they walked at a constant rate, then they walked slower and slower.
They walked quickly, then they were still, then they walked slowly.
They walked in one direction, then they were still, then they walked in the opposite direction.
They walked uphill quickly, then they were still, then they walked downhill slowly.
They walked faster and faster until they walked at a constant rate, then they walked slower and slower.
They walked quickly, then they were still, then they walked slowly.
They walked in one direction, then they were still, then they walked in the opposite direction.
2 answers:
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Answer:
Explanation:
<u>Motion with Constant Acceleration</u>
A body moves with constant acceleration when the speed changes uniformly in time. The equation used to find the final speed vf is
Where vo is the initial speed, a is the acceleration, and t is the time.
The cyclist has an initial speed of vo=10 miles/hour and ends up at vf=20 miles/hour in t=5 seconds.
Both speeds are given in miles/hour and we must convert it to m/s:
1 mile/hour = 0.44704 m/s
10 mile/hour = 4.47 m/s
20 mile/hour = 8.94 m/s
The acceleration is calculated by solving for a: