Study

EASE 3 Exercise

  •   0%
  •  0     0     0

      Back   Restart
  • A force of 4 N acts on a lever 2 m from the pivot. What is the moment?
    8 Nm
  • Mike and Oliver sit on a see-saw. Mike sits 2 m away from the pivot and weighed 500 N downward, while Oliver is x meter away from the pivot and weighed 1000 N. What is the value of x?
    1.0 m
  • Lightning is an example of charging materials by
    friction
  • Tendency of a force to rotate a rigid body about any defined axis is called as ______
    moment
  • Which point label the electron?
    D
  • What will a positively charged object brought close to a negatively charged object do?
    attract
  • The one with minus sign is called
    electron
  • What can the boys do to balance the seesaw?
    Boy W moves closer to F
  • ball A is given negative charge. a polythene rod is charged by rubbing it with woolen clothes. It will attract balloon A. What particles are transferred from the cloth to the rod when it become charged?
    Electrons
  • SI unit of charge is?
    Coulomb (C)
  • Aluminum, glass, plastic, wood. Out of those four, which material could you put in the gap to make reading on the meter?
    Aluminum
  • A Van de Graaff generator makes your hair stand on end because…
    2. each strand of hair picks up the same charge and repels each other
  • An object A has a positive charge and it attracts object B. If object A is placed near object C, they attract each other. Object C also attracts object D. What is the electric charge of object B, C, and D?
    B (-), C (-), D (+)
  • By using the principle of moment, determine the direction of the see-saw as shown.
    Turning in the clockwise direction
  • Which of the given conditions above increases the moments?
    i and ii
  • What force causes an object to become charged when it is rubbed?
    magnetic
  • Which class lever does the photo show?
    class 1: A and C, class 3: B
  • What are the charges on sides X and Y of the sphere?
    X = - (N) || Y = + (P)
  • A class 2 lever has the _________ in the middle
    load
  • Which lever will make it easiest to move the rock?
    B
  • ball A is given negative charge. a polythene rod is charged by rubbing it with woolen clothes. It will attract balloon A. What charge does the rod have after rubbing?
    negative charge
  • Where is the position of the pivot?
    C
  • Some materials which allow an electric current to flow through them are called
    conductor
  • If the clockwise and anticlockwise moments on a seesaw are equal, what will happen?
    The seesaw is balanced and will not move.
  • Fill in the blanks with appropriate order of the words.
    negative, positive
  • ball A is given negative charge. a polythene rod is charged by rubbing it with woolen clothes. It will attract balloon A. What charge does the balloon A in third experiment?
    positive charge
  • Which point is the pivot?
    B
  • complete the last column to show whether you would expect the balloons to attract or repel one another. p? q?
    p= attract, q= repel
  • An example of a class 2 lever type is
    nutcracker
  • Calculate the moment of the force about the pivot.
    4 Nm
  • How can neutral polythene becomes negatively charged after rubbed with wool?
    2. Negative charge moves from the wool to the polythene
  • What will happen to the seesaw when both people get on?
    it will turn in an anti-clockwise direction
  • What is the force F needed to balance the see-saw?
    m1=m2 | F1 x A1=F2 x A2 | F x 7=700 x 3 | F = 300 N
  • Calculate the weight labeled A in the diagram.
    m1=m2 | F1 x A1=F2 x A2 | 4 N x 3 m = A x 2 m | A = 6 N
  • When an object is charged, which of the above changes?
    B. the number of electrons
    • Your experience on this site will be improved by allowing cookies.