June 2018 Physics Regents Questions 31-40 Question Preview (ID: 59802)

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An object weighing 2.0 newtons is pushed across a horizontal, frictionless surface by a horizontal force of 4.0 newtons. The magnitude of the net force acting on the object is

a) 0.0 N

b) 2.0 N

c) 8.0 N

d) 4.0 N

After a 65-newton weight has fallen freely from rest a vertical distance of 5.3 meters, the kinetic energy of the weight is

a) 12 J

b) 340 J

c) 910 J

d) 1800 J

What is the magnitude of the total momentum of the two-cart system after the collision?

a) 0.22 kg•m/s

b) 0.39 kg•m/s

c) 1.98 kg•m/s

d) 4.29 kg•m/s

What is the magnitude of the electrostatic force exerted on an electron by another electron when they are 0.10 meter apart?

a) 2.6 × 10^−36 N

b) 2.3 × 10^−27 N

c) 2.3 × 10^−26 N

d) 1.4 × 10^−8 N

The height of an individual step on a staircase is closest to

a) 2.0 × 10^−2 m

b) 2.0 × 10^−1 m

c) 2.0 × 10^−0 m

d) 2.0 × 10^−1 m

Which diagram correctly represents an electric field?

a) 1

b) 2

c) 3

d) 4

Which points on the wave diagram below are 90º out of phase with each other?

a) A and E

b) B and C

c) C and D

d) D and E

When the switch is open, there is an electric current in

a) lamp I, only

b) lamps II and III, only

c) lamps I, II, and III

d) none of the lamps

The energy equivalent of the rest mass of an electron is

a) 2.73 × 10^−22 J

b) 8.20 × 10^−14 J

c) 1.50 × 10^−10 J

d) 1.44 × 10^−2 J

A spring has an unstretched length of 0.40 meter. The spring is stretched to a length of 0.60 meter when a 10.-newton weight is hung motionless from one end. The spring constant of this spring is

a) 10. N/m

b) 17 N/m

c) 25 N/m

d) 50 N/m

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