Two forces of magnitudes 7 N and 5 N act at a point. Which one of the following is not a possible value for the magnitude of the resultant force? A. 1 N B. 3 N C. 5 N D. 7 N

Which of the following contains three

scalar quantities?

A. mass, charge, speed

B. density, weight, mass

C. speed, weight, charge

D. charge, weight, density

Two objects X and Y are moving away from the point P. The diagram below shows the velocity vectors of the two objects. Which of the following velocity vectors best represents the resultant velocity vector?

P

Velocity vector for object Y

Velocity vector for object X

A. B.

C. D.

In an optical experiment a deflected ray of light is measured

to be at an angle ( )23 1

Find the sine of this angle and then determine the

minimum and maximum acceptable values of this

experimental value.

Which of the following represents

two vector quantities?

A. distance, acceleration

B. kinetic energy, work

C. force, momentum

D. electric field strength, electric

potential

Given two masses, m1=(100.0 ± 0.4 g) and m2=(49.3 ± 0.3 g), what is their sum (expressed with proper uncertainties)?

149.3 ± 0.7 g

The diagram shows two vectors X and Y.

X

Y

Which of the following best represents the vector Z = X – Y?

A.Z

B.Z

C.

Z

D.

Z

Add the following distances and express your result in units of centimeters (cm).

1.250 x 10-3 m + 25.62 cm + 426 mm

68.3 cm

Which of the following lists two scalar quantities? A. emf, momentum B. emf, weight C. impulse, kinetic energy D. magnetic flux, kinetic energy

The time taken for a stone dropped from rest to fall vertically through 16 m is 2.0 s. Based on these measurements, what is the best estimate for the acceleration of free fall? A. 4.0 m s–2 B. 8.0 m s–2 C. 9.8 m s–2 D. 10 m s–2

Which of the following is equivalent to the joule? A. N m2 B. N m–2 C. kg m s–2 D. kg m2 s–2

A volume is measured to be 52 mm3. This volume in m3 is A. 5.2 × 103 m3. B. 5.2 × 101 m3. C. 5.2 × 10–1 m3. D. 5.2 × 10–8 m3.

An object falls for a time of 0.25 s. The acceleration of free fall is 9.81 m s–2. The displacement is calculated. Which of the following gives the correct number of significant digits for the calculated value of the displacement of the object?

A. 1 B. 2 C. 3 D. 4

The kilowatt-hour is equivalent to approximately A. 60 J. B. 3.6 x 103 J. C. 8.6 x 104 J. D. 3.6 x 106 J.

The time elapsed since the beginning of the universe is of the order of A. 108 s. B. 1018 s. C. 1028 s. D. 1038 s.