1 When speed of a body is zero it is considered to be at 2

Last updated: 6/11/2023

1 When speed of a body is zero it is considered to be at 2 For the force to act the two bodies must 3 By applying force in the direction opposite to the direction of the motion of a body we can its speed and the wheel slows down or stops a moving vehicle different parts of the rotating machine get damaged with time replacement 3 State whether the following statements are true T or false F Correct the false statements 1 The force acting on a body increases the mass of the body 2 Force can change the direction of motion 4 Friction between the 6 5 Friction causes wastage of As friction produces and need 3 If the applied force is not enough the object may not move 4 Less force will be required to move a heavier body than a lighter one 5 Friction causes wear and tear of the surfaces in contact 6 Only solid surfaces experience friction Choose the correct option 1 Which of the following is an effect of force a Starts motion c Stops motion 2 Which of the following is not a unit of force a gram force b dyne 3 Kneading dough shows which effect of force a change in speed c change in shape and size 4 Which of the following is not an effect of friction a To produce heat c To cause wear and tear of the surfaces 5 Which of the following is not a type of friction a Rolling friction b Static friction 6 Friction can be reduced by a using ball bearings b polishing b Changes the direction of motion d All of them c joule b change in direction d change in mass b To increase the speed of the body d To oppose the motion of the body c Slowing friction d newton c streamlining d Sliding friction d all of them