Physics (Chapter 9 and 10)

Speed is the measurement of how

• far an object moves.

• fast an object moves.

• long an object moves.

• often an object moves.

Which of the following statement describes both speed and velocity?

• both speed and velocity cannot be zero

• speed and velocity are vector quantities

• the magnitudes of speed and velocity are represented by using the same units

• both refer to the rate at which an object changes position in a specific direction

Figure 9.1 shows a woman pulling a luggage bag. The force applied by the lady has

• direction only.

• magnitude only.

• both direction and magnitude.

• neither magnitude nor direction.

Figure shows the distance travelled by four cars A, B, C and D over a period of time. Which car traveled with speed of 30km/hr?

• Car A

• Car B

• Car C

• Car D

A student observes that the velocity of a falling object increases with time. In scientific investigation, which of the following statement is made after the observation?

• velocity of object increases with time

• velocity of an object can be measured

• how the velocity of object changes with time

• determine the velocity of the object at various time interval

Which of the following displacement- time graphs best describes a vehicle moving with uniform velocity?

• i only.

• i and ii.

• ii and iii.

• ii and iv.

Figure shows different people at different locations. Who will experience the maximum acceleration due to gravity?

• Pema

• Dorji

• Sonam

• Karma

The gravitational force on the moon is lesser than Earth because the Moon

• is far away from the Earth.

• has less mass than the Earth.

• is closer to the Sun than to Earth.

• has more mass than the Earth

Sonam lives in Gelephu . During vacation he goes to Lunana to meet his parents. Sonam experiences a change in his body weight. Which graph below best represents this phenomenon?

• 1

• 2

• 3

• 4

A fluid which is thick and sticky is a viscous fluid. Fluid friction increases with increase in viscosity of fluid. Choden dropped a marble in four different fluids as shown in Figure 9.10. In which fluid would the marble experience more friction?

• oil

• milk

• honey

• kerosene