When the velocity and acceleration of an object have opposite signs, the speed of the object increases
Indicate whether the statement is true or false
FALSE
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Suppose that a planet was discovered that has twice the mass and twice the diameter of Earth. What would be the escape velocity for this planet? (Assume that for Earth the escape velocity is 11 km/s.)
A. 15.6 km/s B. 11 km/s C. 22 km/s D. 7.8 km/s
A body moving in a circular path at constant speed exhibits acceleration because its ________ is changing.
Fill in the blank(s) with the appropriate word(s).
Which of the following is a unit of mass density?
a. kg/m3 b. g/cm2 c. lb/ft3 d. lb/ft2
If you know the impulse that has acted on a body of mass m you can calculate
a. its initial velocity. b. its final velocity. c. its final momentum. d. the change in its velocity. e. its acceleration during the impulse.