Question

Question 2 (1 point) Bob drives his car 145.00 km [N], then he stops to get gas. Then he drives his car 101.00 km (E), and stops to eat doughnuts. The he drives his car 239.00 km [S], and his journey ends. Bob's trip is completed in a time of 10.6 hours. The mass of his car is 1,673 kg. What is Bob's average speed in km/h? Enter your answer up to 5 decimal places. Do not enter units. Your Answer: Answer Previous Page Next Page Page 2 of 10

Answer 1

2)
Total distance travelled by Bob, D = 145 + 101 + 239 = 485 km
Total time taken for the journey, T = 10.6 hours
Average speed, v = D / T
= 485 / 10.6
= 45.755 km/h

3)
The initial speed of the cannon, u = 28.48 m/s
The final speed of the cannon, v = 0
Acceleration, a = - 9.8 m/s²
Consider h as the maximum height reached by the watermelon.

Using the formula, v² - u² = 2 * a * h,
h = (v² - u²) / (2 * a)
= (0 - 28.48²) / (2 * -9.8067)
= 41.355 m