A car increases its speed from 60 to 65 miles per hour in the same time that a bicycle increases its speed from rest to 5 miles per hour. Acceleration is
1) greater for the car,
2) greater for the bicycle,
3) the same for each,
principally because
4) the car undergoes the greater change in velocity.
5) the bicycle has considerably less mass.
6) both undergo equal increases in velocity during the same interval of time.
Answer: 3, 6
You might also like to view...
For safety in climbing, a mountaineer uses a 50-m long nylon rope that is 1.0 cm in diameter. When supporting a 90-kg climber, the rope elongates 1.6 m. Find the Young's modulus for the rope material
A long straight wire is parallel to one edge and is in the plane of a single-turn rectangular loop as shown. If the loop is changing width so that the distance x changes at a constant rate of 4.0 cm/s, what is the magnitude of the emf induced in the loop at an instant when x = 6.0 cm? Let a = 2.0 cm, b = 1.2 m, and I = 30 A
a.
5.3 ?V
b.
2.4 ?V
c.
4.8 ?V
d.
2.6 ?V
e.
1.3 ?V
Two charges Q1 = -3 ?C and Q2 = +3 ?C are located on the y-axis at y1 = -5 cm and y2 = +5 cm respectively. A third charge Q3 = +24 ?C is added on the y-axis so that the electric field at the origin is equal to zero
What is the position of Q3? A) y3 = -12 cm B) y3 = 0 cm C) y3 = +5 cm D) y3 = +10 cm E) y3 = -10 cm
Which of these is the classic continuous spectrum?
A) sunlight B) a rainbow C) a neon light D) a fluorescent light E) a glowing nebula, such as M-42