1) The change in velocity of an object over time. a) conservation of momentum b) acceleration c) atmosphere d) scalar quantity 2) A force that acts in the opposite direction to an object’s movement as it travels through the air. a) air resistance b) contact force c) centre of mass d) atmospheric pressure 3) The layer of gases that surrounds the Earth. a) centre of mass b) deceleration c) atmosphere d) acceleration 4) The pressure created by air molecules colliding with the surface of the Earth. a) component forces  b) centre of mass c) atmospheric pressure d) conservation of momentum 5) The distance a vehicle travels under the braking force. a) air resistance b) compressed c) braking distance d) scalar quantity 6) The single point at which the weight of an object is considered to act. a) centre of mass b) compressed c) atmosphere d) conservation of momentum 7) An object or group of objects in which the total amount of energy is constant. a) atmosphere b) contact force c) closed system d) conservation of momentum 8) A single resultant force can be resolved into these two perpendicular forces. a) compressed b) velocity c) centre of mass d) component forces  9) Pressed or squeezed together.  a) compressed b) braking distance c) deceleration d) conservation of momentum 10) In a closed system, the total momentum before an event is equal to the total momentum after the event. a) conservation of momentum b) closed system c) vector quantity d) deceleration 11) A force that acts between objects that are physically touching. a) contact force b) centre of mass c) air resistance d) deceleration 12) The decrease in velocity of an object over time. a) velocity b) closed system c) atmosphere d) deceleration 13) Speed in a given direction. It is a vector quantity. a) atmosphere b) component forces  c) velocity d) vector quantity 14) A quantity that has magnitude and an associated direction. a) contact force b) vector quantity c) air resistance d) velocity 15) A quantity that has magnitude only. a) scalar quantity b) conservation of momentum c) atmospheric pressure d) vector quantity

Forces Flying Fruit

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