Quiz for motion in a plane

Q1: What is the magnitude of a vector with components 3i and 4j?

A. 3 B. 4 C. 5 D. 7

Q2: Two vectors are perpendicular if their dot product is?

A. 1 B. 0 C. -1 D. ∞

Q3: Projectile motion is a combination of?

A. Uniform circular motion and linear motion B. Uniform and accelerated motion C. Uniform and non-uniform motion D. Linear and non-linear motion

Q4: Maximum height of a projectile is given by?

A. u²sin²θ/2g B. u²cos²θ/g C. u²sin²θ/g D. u²sinθ/g

Q5: The path of a projectile is a?

A. Straight line B. Circle C. Parabola D. Ellipse

Q6: Time of flight of a projectile is given by?

A. 2usinθ/g B. usinθ/g C. u²sinθ/g D. 2u²sinθ/g

Q7: Horizontal range is maximum when angle of projection is?

A. 30° B. 60° C. 90° D. 45°

Q8: The component of acceleration in uniform circular motion is?

A. Zero B. Tangential C. Radial D. Both radial and tangential

Q9: Resultant of two equal vectors inclined at 90° is?

A. √2 times one vector B. 2 times one vector C. Same as one vector D. Zero

Q10: Displacement is a?

A. Scalar quantity B. Vector quantity C. Both scalar and vector D. Neither

Q11: Which quantity remains constant in projectile motion?

A. Vertical velocity B. Horizontal velocity C. Total velocity D. Acceleration

Q12: Angle between two vectors A and -A is?

A. 0° B. 90° C. 180° D. 45°

Q13: Dot product of perpendicular vectors is?

A. Zero B. One C. Equal to magnitude D. Undefined

Q14: Cross product of two parallel vectors is?

A. Zero B. One C. Maximum D. Infinity

Q15: At the topmost point of projectile, vertical component of velocity is?

A. Maximum B. Zero C. Equal to horizontal component D. Negative

Q16: Acceleration in projectile motion is?

A. Zero B. g downward C. g upward D. Horizontal

Q17: Vector addition is done using?

A. Pythagoras theorem B. Trigonometry C. Triangle/parallelogram law D. Algebra

Q18: Unit vector has magnitude?

A. 1 B. 0 C. Any value D. -1

Q19: Displacement after a full circle is?

A. 2πr B. πr C. Zero D. r

Q20: If R is range, angle θ and (90°−θ) give?

A. Same range B. Different range C. Maximum and minimum range D. Zero range