Forces & Motion
[Pages:6]Forces & Motion
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Scientists define force as a push or a pull. A force is described by its strength and direction in which it exerts.
A force provides an object with the energy to move, stop moving, or change direction. Newton (N) is the standard unit of measure for force.
Sir Isaac Newton is credited with the development of three laws dealing with the movement of objects.
Newton's 1st Law of Motion
An object at rest tends to stay at rest and an object in motion tends to stay in motion, at the same speed and in the same direction, unless a force acts on it.
object at rest
object in motion
Newton's 2nd Law of Motion Acceleration is produced when a force acts on an object. Acceleration of an object depends on its mass and the amount of force applied.
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When the same force is applied to both carts, the acceleration of the empty cart will be greater than the acceleration of the loaded cart.
Newton's 3rd Law of Motion For every action there is an equal and opposite reaction.
Marbles exert equal force on each other.
Both marbles change velocity and direction.
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Forces & Motion
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Gravity is a type of force that pulls objects toward each other and toward the Earth. The amount of gravitational force depends upon the mass of the objects and the distance between them.
The acceleration of an object near the surface of the Earth due to gravity is 9.8 m/s2. If both the acorn and leaf fall from the tree at the same time, air resistance will slow down the leaf and the acorn will hit the ground first. In a vacuum, both will reach the ground at the same time.
gravity air resistance
gravity
vacuum
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Newton's LatwheofpGrirnatvaitbalteiovnersion of this worksheet
All objects in the universe apply a
gravitational force (force of attraction)
similar size similar force
on other objects. The strength of the
gravitational force is dependent upon the
mass of the objects and the distance
between them. The larger the mass of the objects, the larger the force is between the two objects. The farther away
larger mass larger force
the two objects are, the weaker the
gravitational force is between them.
larger distance
weaker force
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Forces & Motion
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Fill in the blanks.
________________ is a push or pull upon an object. It provides an object with the ________________ to move, stop moving, or change direction. ________________ is the standard unit of measure for force.
________________ is an attractive force that pulls objects together. The strength of this force is dependent upon the ______________ of the objects and the ________________ between them.
Newton's 1st Law of Motion An object at rest tends to stay __________________ and an object in motion tends to stay ____________________ unless a ________________ acts on it.
Newton's 2nPd lLeaawseofSMigontioInn or Sign Up to download Acceleration itshperopdruicnetdawbhleenvaefrosricoenacotsf othn iasn worksheet
object. Acceleration of an object depends on its _______________ and the amount of ________________ applied.
Newton's 3rd Law of Motion For every action there is an ________________ and _________________ reaction.
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Forces & Motion
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Look at each example. Check the Law of Motion that is being illustrated.
1st Law of Motion 2nd Law of Motion 3rd Law of Motion
1st Law of Motion 2nd Law of Motion 3rd Law of Motion
1st Law of Motion 2nd Law of Motion 3rd Law of Motion
PleaseSign In or Sign Up to dow1snt lLoaawdof Motion the printable version of this works2nhdeLeatw of Motion 3rd Law of Motion
1st Law of Motion 2nd Law of Motion 3rd Law of Motion
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Forces & Motion
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Fill in the blanks.
______F_o_r_c_e______ is a push or pull upon an object. It provides an object with the _____e_n_e__rg__y_____ to move, stop moving, or change direction. ___N_e_w__t_o_n__(_N_)___ is the standard unit of measure for force.
_____G_r_a__v_it_y_____ is an attractive force that pulls objects together. The strength of this force is dependent upon the ______m__a_s_s____ of the objects and the ____d_i_s_t_a_n_c__e____ between them.
Newton's 1st Law of Motion An object at rest tends to stay ______a__t _r_e_s_t______ and an object in motion tends to stay ______in__m__o_t_i_o_n______ unless a ______f_o_r_c_e______ acts on it.
Newton's 2nPd lLeaawseofSMigontioInn or Sign Up to download Acceleration itshperopdruicnetdawbhleenvaefrosricoenacotsf othn iasn worksheet
object. Acceleration of an object depends on its _____m__a_s__s_____ and the amount of ______fo__rc__e______ applied.
Newton's 3rd Law of Motion For every action there is an ______e_q_u__a_l_____ and _____o_p__p_o_s_i_t_e____ reaction.
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