Pre UPS SP015 set 2

1. Distance is a scalar quantity. What is dimension for distance?

• A. D

• B. m

• C. L

• D. x

2. Vector quantity has magnitude and direction. Can you give example?

• A. Mass

• B. Time

• C. Distance

• D. Momentum

3. Which of the following statements is not true about the dimension of physical quantities?

• A. A method by which physical quantity can be expresses in the form of combinations of basic quantities.

• B. The principle of homogeneity can be used to determine whether the equation is correct or not.

• C. The unit of physical quantities can be determined by using dimensional analysis.

• D. The dimension of a dimensionless quantity can be added.

4. Area under the velocity-time graph equal

• A. Velocity

• B. Acceleration

• C. Displacement

• D. Force

5. What is the average velocity of an object?

• A. Rate of change in displacement

• B. Rate of change in acceleration.

• C. Rate of change in distance.

• D. Rate of change in momentum.

6. An object undergoes projectile motion has constant ____________.

• A. vertical velocity

• B. vertical acceleration

• C. horizontal displacement

• D. time

 

7. A ball is projected from a building at certain angle. Which of the following is CORRECTLY described the horizontal component of velocity, v_x and the vertical component of acceleration, a_y of the ball as it falls?

• A.

  v_{x ;} Constant

  a_y; Constant

• B.

  v_{x ;} Varying

  a_{y ;} Constant

• C.

  v_{x ;} Varying

  a_{y ;} Varying

• D.

  v_{x ;} Constant

  a_{y ;} Varying

8. A stone is thrown at an angle, ɵ to the horizontal. The acceleration of that ball when it is in the air

• A. decreases then increases

• B. changes the direction

• C. is constant

• D. is zero

9. Which physical quantity is represented by the area under force-time graph?

• A. Momentum

• B. Impulse

• C. Work done

• C. Distance

10. Which statement is true about elastic collision?

• A. Total kinetic energy is conserved.

• B. Total momentum is not conserved.

• C. Total kinetic energy is not conserved.

• D. Total momentum before collison is less than the total momentum after collision.