If an object's acceleration is positive, its speed must be increasing
Indicate whether the statement is true or false
F
It could have a negative velocity that is getting less negative, which corresponds to a decreasing speed.
You might also like to view...
Voltage produced by a generator alternates because
A) it produces pulses of current. B) the magnetic field that produces it alternates. C) alternations in the mechanical energy input. D) effectively it is an ac motor in reverse. E) the current it produces alternates.
Power: A sand mover at a quarry lifts 2000 kg of sand per minute a vertical distance of 12 m. The sand is initially at rest and is discharged at the top of the sand mover with speed 5.0 m/s into a loading chute. What minimum power must be supplied to this machine?
A. 520 W B. 3.9 kW C. 6.7 kW D. 4.3 kW E. 1.1 kW
The term critical mass refers to the least amount of mass that can
A) sustain a chain reaction. B) squelch a chain reaction. C) explode when rapidly brought against a neighboring piece. D) none of the above
Pulsars cannot be spinning white dwarfs because
a. white dwarfs are not that common. b. white dwarfs are not dense enough. c. white dwarfs do not have magnetic fields. d. a white dwarf spinning that fast would fly apart. e. all of the above