Q and A about forces and their effects
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Name 3 things in which a force can do to a ball. | They can make the ball move, make the ball stop, make the ball change directions, make the ball increase the speed, change the shape of the ball.
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| Define: synthetic | man-made/ artificial
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| How do you measure forces? In what measurement? | Using a Newton spring balance.
Using the measurement: N= Newtons
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| Define the two main types of forces: contact force and non contact force. | Contact force- when the object or material exerting force touches the object or material.
Non-contact force- when the object or material does not touch each other.
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| What are the two contact forces? Define each of them. | [impact force- when a movie object collides with a stationary object, the impact force is exerted by one object to another][strain force-hen elastic materials are squashed,stretched, twisted or bent they exert a force which acts in the opposite directions
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| What are the 3 non-contact forces? | magnetic force, electrostatic force and gravitational force
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| What happens when a north and north pole are put together? Why? | similar poles repels - your hands will be pushed apart
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| What happens when a south and north poles are put together? Why? | different poles attract each other - your hands will be brought closer. the same goes to electrostatic force.
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| What is the purpose of a 'stop' on spring balances? | prevents the spring from stretching beyond its elastic limit
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| Why would a spring balance without a stop give wrong readings for the weights of the masses hung from it if large masses were used? | the string would is stretched so much until it remained slightly stretched. The spring had gone beyond a point called the elastic limit and is permanently deformed. The spring no longer extends in proportion to the mass, giving wrong readings
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Created by:
hamizah
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