Posted by Ariel on Monday, July 12, 2010 at 2:22pm.
These are questions I'm unsure about out of 20 for my submission #2. Someone please check soon. My answers have an =.
1.)A ball is rolling across the top of a billiard table and slowly rolls to a stop. How would Galileo explain the motion of the ball as it stopped?
a)The ball's natural state is at rest b)The ball stopped because it ceased to be pushed
=c)The ball stopped due to external forces such as friction
2.)The distance an object travels per unit of time
=a)Is its speed
b)Is its velocity
c)Is its acceleration
3.) A man leaves his house and begins walking in a straight line. After 2 hours he is ten miles from home. Calculate the man's average speed in terms of feet per second. (There are 3600 seconds in an hour and 5280 feet in a mile.)
a).14 feet per second
b)1.47 feet per second
=c)7.33 feet per second
d)380160000 feet per second
4.)A woman is walking at a rate of 4 miles per hour. Her pet hedgehog is walking at a rate of 5.82 feet per second. Who is traveling faster?
c)Neither, they are traveling at the same speed
5.)The distance and direction an object travels per unit of time
a)Is its speed
=b)Is its velocity
c)Is its acceleration
6.)A car traveling at 8m/s due north speeds up to 10m/s in the same direction. If it takes the car 5 seconds to change its velocity what is the car's acceleration?
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