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3NA_Rev_Forces_Density_kinematics_Deyi_2021

Quiz by Jessica Lew

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7 questions
Show answers
  • Q1

    The diagram shows three forces acting on a block. Which of the following statements is true?

    Question Image

    There is a resultant force of 6 N to the right.

    There is a resultant force of 30 N to the right.

    There is a resultant force of 6 N to the left.

    There is a resultant force of 30 N to the left

    60s
  • Q2

    A submarine of mass 900 kg ascends vertically at a constant speed of 4.0 m/s to the surface of the water.  What is the resultant force acting on it?[Clue: Constant velocity means Zero Acceleration!]

    3600 N

    0 N

    9000 N

    900 N

    60s
  • Q3

    The velocity–time graph shows the motion of an object moving in a straight line. What may be deduced about the acceleration of the object during the first 5 ?

    Question Image

    decreasing acceleration

    increasing acceleration

    constant acceleration

    zero acceleration

    60s
  • Q4

    A cube of side 2.0 cm is placed on a balance. What is the density of the cube?[Hint: Density = Mass/Volume; Volume of cube= 2 x 2 x 2 ]

    Question Image

    1.8 g/cm3

    0.90 g/cm3

    3.6 g/cm3

    1.2 g/cm3

    60s
  • Q5

    A student quickly pulls a smooth cloth from under a plate on a table. The plate resists the change in the state of rest and stays on the table. What is this resistance to any change of motion know as?

    Weight

    Density

    Inertia

    Pressure

    60s
  • Q6

    A rectangular box of weight 19.2 N has dimensions 8 cm by 6 cm by 2 cm. What is the maximum pressure exerted?[Clue: Pressure= Force/Area, Maximum pressure means smallest area ]

    1.6N/cm2

    1.2N/cm2       

    4.8N/cm2

    0.4N/cm2

    60s
  • Q7

    The angle of oscillation of a simple pendulum, of fixed length, is 10o and its period of oscillation is 0.78 s.  If the angle of oscillation is increased to 20o, what would be its period of oscillation?

    0.39 s

    1.56 s

    3.12 s

    0.78 s

    60s

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