Can a car be accelerating when its speed is constant?
A. Yes. Velocity has both a magnitude (speed) and a direction. If the direction is changing there is an acceleration.
B. No. If speed is constant there is no change so therefore no acceleration.
C. No. Acceleration is the rate of change of velocity. If the speed is constant the velocity is not changing.
D. Yes. Acceleration and speed are not related, so a constant speed has no effect on acceleration.
© 2019 McGraw-Hill Education
A. Yes. Velocity has both a magnitude (speed) and a direction. If the direction is changing there is an acceleration.
You might also like to view...
The two men compete in a tug of war. Both pull equally and the scale reads 800 newtons. Each man must pull with a force of
1) 400 N. 2) 800 N. 3) 0 N. Consider action and reaction forces in this case: If action is the man on the left pulling on the rope, then the reaction force is 4) the rope pulling on the man on the left. 5) the rope pulling on the man on the right. 6) the man on the right pulling on the rope.
An ideal, reversible refrigerator keeps food in the freezer portion 
and dumps excess heat into the kitchen, whose temperature is 
What is the refrigerator’s coefficient of performance under these conditions?
A. 7.4 B. 4.0 C. 8.4 D. 2.1
The diagram below shows the position of a long straight wire perpendicular to the page and a set of directions labeled A through H. When the current in the wire is directed up out of the page, the direction of the magnetic field at point P is
a.
E.
b.
F.
c.
G.
d.
H.
e.
A.
Potential Energy: The figure shows an arrangement of two particles each having charge Q = -6.8 nC and each separated by 5.0 mm from a proton. If the two particles are held fixed at their locations and the proton is set into motion as shown, what is the minimum speed the proton needs to totally escape from these particles? (mproton = 1.67 × 10-27 kg, e = 1.60 × 10-19 C, k = 1/4??0 = 9.0 × 109 N ? m2/C2) 
A. 2.2 × 106 m/s B. 4.3 × 106 m/s C. 8.3 × 106 m/s D. 1.7 × 107 m/s