#questi1. A sound with a frequency of 261.6 Hz travels through water at a speed of 1435 m/s. What is the wavelength of the wave?

a. 1.83 x 10 -1 m
b. 3.753 x 10 5 m
c. 5.486 m
d. You cannot tell from the given information

2. A 23.0 kg mass of is accelerated at + 4.50 m/s2. What is the force acting on the mass?

a. 1.95 x 10 -1 N
b. +104 N
c. + 5.11 N
d. 225.4 N

3. A 72.34 kg skater accelerates to a stop with a force of - 34 .4N. What is the skater’s acceleration?

a. – 2.49 x 10-3 m/s2
b. + 2.49 x 10-3 m/s2
c. – 4.75 x 10-1 m/s2
d. 2.10 m/s2

4. In the absence of friction, the net force required to keep a 6.00-kg object moving with a constant velocity of 2.000 m/s is __ N.

a. 0.333 N
b. 2. 3 N
c. 12 N
d. No force is required to keep the object in motion.

5. If the net force acting upon an object is 0 N, then the object MUST ____.

a. be moving
b. be accelerating
c. be at rest
d. be moving with a constant speed in the same direction
e. Either c or d.
on..

Posted Date: 12/21/2012 2:09:03 AM | Location :

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