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Author Question: When Jim and Rob ride bicycles, Jim can only accelerate at three quarters the acceleration of Rob. ... (Read 39 times)

tsand2

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  • Posts: 520
on: Jul 28, 2018
When Jim and Rob ride bicycles, Jim can only accelerate at three quarters the acceleration of Rob. Both start from rest at the bottom of a long straight road with constant upward slope. If Rob takes 5.0 minutes to reach the top, how much earlier should Jim start to reach the top at the same time as Rob?
 a. 25 s
  b. 40 s
  c. 46 s
  d. 55 s
  e. 75 s

Question 2

A rocket, initially at rest, is fired vertically with an upward acceleration of 10 m/s2 . At an altitude of 0.50 km, the engine of the rocket cuts off. What is the maximum altitude it achieves?
 a. 1.9 km
  b. 1.3 km
  c. 1.6 km
  d. 1.0 km
  e. 2.1 km


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mirabriestensky

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Reply #1 on: Jul 28, 2018
Answer to Question 1

C

Answer to Question 2

D


tsand2

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  • Posts: 520
Reply 2 on: Jul 28, 2018
Thanks for the timely response, appreciate it

ricroger

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Reply 3 on: Yesterday
Wow, this really help

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