PhysicsFinal

A space ship with a dead engine in remote outer space continues moving
- a) because some kind of force acts on it
- b) in a curved path
- c) even though no net force acts on it
- d) due to gravity
Which of the following best describes when Newton's 1st Law is true?
- a) when there is no air resistance
- b) when there is no friction
- c)when there is no air resistance and there is no friction
- d) always
A 20kg bicycle is traveling on a straight flat road at a speed of 10m/s. What is the net force on the bicylce?
- a) 0 N
- b) 10 N
- c) 20 N
- d) 30 N
- e) 200 N
Suppose you push with a 200 N of force agianst your 1500-N refrigerator and it slides across your kitchen floor in a straight line at a constant speed. The friction force of the the floor against the refrigeratr must be
- a) zero
- b) 200 N
- c) 1300 N
- d) 1500 N
- e) greater than 1500 N
...and the force with which you push must be
- a) equal and oppositely directed to the friction force
- b) the action force, and the friction the reaction force
- c) both of these
- d) none of these
I throw an apple into the air at 30 m/s. At the top of its trajectory, its acceleration is
- a) 0 m/s^2
- b) 5 m/s^2
- c) 10 m/s^2
- d) 20 m/s^2
- e) 45 m/s^2
A car increases its speed from 60 to 65 miles per hour in the same time that a bicycle increases its speed from 0 to 5 mph. In this case the acceleration is greater for the
- a) car
- b) bicyle
- c) ...it is the same for each

Author

tashaluth

189573

Card Set

PhysicsFinal

Description

jnkjn

Updated

2012-12-16T07:57:29Z