1) Newton is the unit of the following except a) pulling force b) weight c) mass d) pressing force 2) Which of the following is the amount of matter of an object? a) weight b) pressure c) mass d) pressing force 3) The following are the action of force except a) Change the shape of an object b) Change the speed of a moving object c) the direction of a moving object d) change the size of an object 4) Which of the following does not affect the magnitude of frictional force? a) pressure b) area of contact surface c) smoothness of contact surface d) speed of the moving object 5) The direction of the frictional force is always ... to the moving direction of an object. a) same b) opposite 6) Which of the following is used to measure force? a) spring balance b) measuring cylinder c) triple beam balance d) thermometer 7) A bus driver found it is more difficult to control the bus during rainy day. This is because rainwater a) absorbed by the tyres. b) increases the friction of tyres and the road c) reduces the friction of tyres and the road d) reduces the friction in the bus engine 8) ....is the pull of gravity on an object. a) Velocity b) Pressure c) Weight d) Mass 9) The unit of mass is a) kilogram (kg) b) Newton (N) c) Pascal (Pa) d) m/s 10) Friction decreases when pressing force .... and surface is .... a) decreases, rougher b) decreases, smoother  c) increases, rougher d) increases, smoother 11) Which has the greatest friction? a) Rough surface, small weight b) Rough surface, large weight c) Smooth surface, small weight d) Smooth surface, large weight 12) Which is not true about mass? a) It is the amount of matter in an object. b) It is the same at any place c) It is measured by triple beam balance d) It is measured in Newton(N) 13) Which of the following has the greatest weight? a) 30kg b) 20N c) 100N d) 40kg 14) Which of the following is NOT TRUE about mass? a) It is measured by triple beam balance. b) Its unit is kilogram (kg). c) It is does not change from place to place. d) It is the pull of gravity on an object. 15) When two opposing force that resists the motion between 2 objects are a) force of gravity b) frictional force c) elastic force d) pulling force 16) All of the followings are non-contact force except a) gravity force b) magnetic force c) friction force d) electrostatic force 17) At which location has the greatest gravity force? a) At mountain top of equator b) At the ground of north pole  c) at the mountain top of south pole d) On the sea level of equator

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