فيزياء (صباحي)

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Questions and Answers

Which of the following is not a base quantity?

  • Electric current
  • Weight (correct)
  • Mass
  • Temperature

Which of the following is the SI unit for length?

  • Meter (correct)
  • Kelvin
  • Kilogram
  • Second

Which of the following is the SI unit for time?

  • Kilogram
  • Kelvin
  • Meter
  • Second (correct)

Which of the following is the SI unit for mass?

<p>Kilogram (B)</p> Signup and view all the answers

Which of the following is the SI unit for temperature?

<p>Kelvin (D)</p> Signup and view all the answers

Which of the following is the SI unit for electric current?

<p>Ampere (C)</p> Signup and view all the answers

Which of the following is the SI unit for luminous intensity?

<p>Candela (A)</p> Signup and view all the answers

Which formula density?

<p>Mass ÷ Volume (A)</p> Signup and view all the answers

What is the unit for work?

<p>Joule (J) (A)</p> Signup and view all the answers

What is the unit for power?

<p>Watt (W) (C)</p> Signup and view all the answers

What is the unit for force?

<p>Newton (N) (B)</p> Signup and view all the answers

What is the formula for acceleration?

<p>Change in Velocity ÷ Time (D)</p> Signup and view all the answers

What is the formula for pressure?

<p>Force ÷ Area (D)</p> Signup and view all the answers

Which of the following is an example of a scalar quantity?

<p>Temperature (A)</p> Signup and view all the answers

Which of the following is an example of a vector quantity?

<p>Momentum (C)</p> Signup and view all the answers

What is the result of adding two vectors?

<p>The vector sum (B)</p> Signup and view all the answers

Which of the following is an example of a vector quantity?

<p>Displacement (B)</p> Signup and view all the answers

What is the result of multiplying a vector by a scalar?

<p>The product (B)</p> Signup and view all the answers

If a time is multiplied by a velocity, what is the resultant quantity?

<p>Scalar quantity (B)</p> Signup and view all the answers

If a speed is multiplied by a time, what is the resultant quantity?

<p>Scalar quantity (B)</p> Signup and view all the answers

If an acceleration is multiplied by a time, what is the resultant quantity?

<p>Vector quantity (A)</p> Signup and view all the answers

Which branch of physics deals with the effect of forces on the motion of bodies?

<p>Mechanics (D)</p> Signup and view all the answers

Which of the following is a vector quantity?

<p>Displacement (A)</p> Signup and view all the answers

What is the SI unit for distance?

<p>Meter (C)</p> Signup and view all the answers

Which part of mechanics is concerned with the description of motion?

<p>Kinematics (C)</p> Signup and view all the answers

What is the difference between distance and displacement?

<p>Distance is a scalar quantity, while displacement is a vector quantity. (B)</p> Signup and view all the answers

Which of the following is an example of a vector quantity?

<p>Displacement (C)</p> Signup and view all the answers

Which of the following best describes the addition of two vectors when they are acting in opposite directions?

<p>The magnitudes of the vectors are subtracted. (C)</p> Signup and view all the answers

Which of the following best describes Newton's first law of motion?

<p>A body at rest will stay at rest, and a body in motion will stay in motion with a constant velocity, unless acted upon by an external force. (D)</p> Signup and view all the answers

What is the unit for force?

<p>Newton (N) (B)</p> Signup and view all the answers

Which of the following is the SI unit for mass?

<p>Kilogram (kg) (A)</p> Signup and view all the answers

Which of the following best describes Newton's First Law of Motion?

<p>A stationary object with no outside force will not move. (D)</p> Signup and view all the answers

Which of the following equations represents Newton's Second Law of Motion?

<p>F = ma (C)</p> Signup and view all the answers

What is the mass of an object that experiences a force of 250 N and accelerates at a rate of 5 m/s^2?

<p>50 kg (B)</p> Signup and view all the answers

What is the acceleration of an object with a mass of 60 kg when a force of 20 N is applied to it?

<p>1.33 m/s^2 (A)</p> Signup and view all the answers

Which of the following best describes Newton's Third Law of Motion?

<p>All of the above. (D)</p> Signup and view all the answers

Which of the following is an example of a derived force?

<p>Tension (C)</p> Signup and view all the answers

What is the force of friction between a block of ice that weighs 950 N and the ground if the coefficient of friction is 0.12?

<p>114 N (D)</p> Signup and view all the answers

What is the force of friction between a 750 N object and a surface if the coefficient of friction (μ) is 0.25?

<p>187.5N (B)</p> Signup and view all the answers

Which of the following is true about friction?

<p>Friction always opposes motion (C)</p> Signup and view all the answers

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