Question

A car travels at 60 km/h for 2 h, then stops for 2.5 h and then it travels 80 km in 30 minutes, all in the same direction. a) Find its average velocity and its average speed. b) Plot its x-t grap ke x =0)

Answer 1

Step-by-step explanation:

Step 1: Calculate Total Distance

• Distance traveled at 60 km/h for 2 hours: 120 km

• Distance traveled at 80 km/h for 0.5 hours: 40 km

• Total Distance: 120 km + 0 km + 40 km = 160 km

Step 2: Calculate Total Time

• Time traveled at 60 km/h: 2 hours

• Time stopped: 2.5 hours

• Time traveled at 80 km/h: 0.5 hours

• Total Time: 2 hours + 2.5 hours + 0.5 hours = 5 hours

Step 3: Calculate Average Velocity and Speed

• Average Velocity = Total Displacement / Total Time = 0 km / 5 hours = 0 km/h

• Average Speed = Total Distance / Total Time = 160 km / 5 hours = 32 km/h

Step 4: Plot the x-t Graph

The x-t graph is a horizontal line at x = 0 (no change in position) over 5 hours.