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
c
You might also like to view...
Once a terrestrial planet had formed from a large number of planetesimals, heat could have melted it and allowed it to differentiate into a metallic core of ____________density and a rocky mantle or crust of ____________ density
a. higher; lower b. lower; higher c. Wrong! The interior stays solid. d. Wrong! There is no separation according to density.
How is right ascension similar to longitude on Earth?
What will be an ideal response?
Exhibit 7-1
Three 5.0-kg masses are located at points in the xy plane as shown in the figure.
?
?
Use this exhibit to answer the following question(s).
Refer to Exhibit 7-1. What is the magnitude of the resultant force (caused by the other two masses) on the mass at the origin?
A. 2.7 × 10?8 N B. 2.1 × 10?8 N C. 1.8 × 10?8 N D. 2.4 × 10?8 N E. 2.9 × 10?8 N
The strongest lines present in spectral class A stars are absorption lines of
A) complex molecules. B) hydrogen. C) oxygen. D) iron. E) helium.