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MDCAT Question Bank

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1009 available questions

Physics · Question 821

Measurements are taken with a Vernier caliper, metre rule and micrometer screw gauge. Which instrument normally gives the most precise reading?

  1. Vernier caliper
  2. Micrometer screw gauge
  3. Metre rule
  4. All have equal precision
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Correct answer: B

Micrometer screw gauge

The printed worksheet key marks B (Micrometer screw gauge) as the correct answer.

Physics · Question 822

Two measurements have fractional uncertainties of 0.04 and 0.02. Which measurement is more accurate?

  1. Measurement with 0.04 uncertainty
  2. Measurement with 0.02 uncertainty
  3. Both are equally accurate
  4. Can't be predicted
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Correct answer: B

Measurement with 0.02 uncertainty

The printed worksheet key marks B (Measurement with 0.02 uncertainty) as the correct answer.

Physics · Question 823

A wire diameter is measured with a micrometer screw gauge. Which reading has an appropriate precision?

  1. 8.1 mm
  2. 8.12 mm
  3. 8.125 mm
  4. 8.1250 mm
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Correct answer: B

8.12 mm

The printed worksheet key marks B (8.12 mm) as the correct answer.

Physics · Question 824

A Vernier caliper gives the same +0.05 mm error in both length and diameter measurements. What type of error is this?

  1. Random error
  2. Personal error
  3. Systematic error
  4. All of these
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Correct answer: C

Systematic error

The printed worksheet key marks C (Systematic error) as the correct answer.

Physics · Question 825

A 60 m long train is moving in a direction with speed 20 m/s. Another train moving with 30 m/s in the opposite direction and 40 m long crosses the first train in:

  1. 5s
  2. 6s
  3. 2 s
  4. 4s
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Correct answer: C

2 s

The printed worksheet key marks C (2 s) as the correct answer.

Physics · Question 826

The downward gravitational force on a stationary object and the upward support force from the floor:

  1. Are an action-reaction pair
  2. Can have equal magnitude but are not an action-reaction pair
  3. Must have unequal magnitudes
  4. Are the same force
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Correct answer: B

Can have equal magnitude but are not an action-reaction pair

The printed worksheet key marks B (Can have equal magnitude but are not an action-reaction pair) as the correct answer.

Physics · Question 827

A projectile has range R at 60°. What other projection angle gives the same range?

  1. 40°
  2. 30°
  3. 50°
  4. 20°
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Correct answer: B

30°

The printed worksheet key marks B (30°) as the correct answer.

Physics · Question 828

During projectile motion the quantities that remain constant are:

  1. Acceleration, Vx
  2. Acceleration, K.E
  3. Force, velocity
  4. Acceleration, Momentum
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Correct answer: A

Acceleration, Vx

The printed worksheet key marks A (Acceleration, Vx) as the correct answer.

Physics · Question 829

The path of projectile is:

  1. Hyperbola
  2. Straight line
  3. Parabola
  4. Ellipse
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Correct answer: C

Parabola

The printed worksheet key marks C (Parabola) as the correct answer.

Physics · Question 830

Projectiles are launched at 20°, 30°, 40° and 50° with the same speed. Which launch gives the maximum range?

  1. 20°
  2. 50°
  3. 30°
  4. Both 40° and 50°
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Correct answer: D

Both 40° and 50°

The printed worksheet key marks D (Both 40° and 50°) as the correct answer.