Learning Materials
Features
Discover
Chapter 2: Q. 14 (page 60)
A jet plane is cruising at 300 m/s when suddenly the pilot turns the engines up to full throttle. After traveling 4.0 km, the jet is moving at a speed of 400 m/s. What is the jet鈥檚 acceleration, assuming it to be a constant acceleration?
The acceleration of the plane is.
Over 30 million students worldwide already upgrade their learning with 91影视!
All the tools & learning materials you need for study success - in one app.
Get started for free
FIGURE Q2.7 shows the position-versus-time graph for a moving
object. At which lettered point or points:
a. Is the object moving the fastest?
b. Is the object moving to the left?
c. Is the object speeding up?
d. Is the object turning around?
FIGURE EX2.4 is the position-versus-time graph of a jogger. What is the jogger鈥檚 velocity at t = 10 s, at t = 25 s, and at t = 35 s?
FIGURE Q2.8 shows six frames from the motion diagrams of two moving cars, A and B.
a. Do the two cars ever have the same position at one instant of time? If so, in which frame number (or numbers)?
b. Do the two cars ever have the same velocity at one instant of time? If so, between which two frames?
The Starship Enterprise returns from warp drive to ordinary
space with a forward speed of 50 km/s. To the crew鈥檚 great surprise,
a Klingon ship is 100 km directly ahead, traveling in the
same direction at a mere 20 km/s. Without evasive action, the
Enterprise will overtake and collide with the Klingons in just
slightly over 3.0 s. The Enterprise鈥檚 computers react instantly to
brake the ship. What magnitude acceleration does the Enterprise
need to just barely avoid a collision with the Klingon ship?
Assume the acceleration is constant.
Hint: Draw a position-versus-time graph showing the motions
of both the Enterprise and the Klingon ship. Let x0 = 0 km be
the location of the Enterprise as it returns from warp drive. How
do you show graphically the situation in which the collision is
鈥渂arely avoided鈥�? Once you decide what it looks like graphically,
express that situation mathematically.
Nicole throws a ball straight up. Chad watches the ball from a window 5.0 m above the point where Nicole released it. The ball passes Chad on the way up, and it has a speed of 10 m/s as it passes him on the way back down. How fast did Nicole throw the ball?
What do you think about this solution?
We value your feedback to improve our textbook solutions.
Explanations 
Textbooks 
Flashcards 
91影视 AI 
Notes 
Study Plans 
Study Sets 
Find a degree 
Magazine