Forces Newtons Laws Review Game The force exerted

• The force exerted by gravity is stronger if two objects are closer.

• Weight is the measure of the force of _____ on an object.

• What action/reaction forces act on an apple as it falls through the

• Friction acts in a direction ______ to the direction of an object’s

• • • An object in free fall ______ until it reaches terminal

• • • A(n) ____ can cause an object’s motion to change a.

• A newton is the unit that goes with measurements of _____. •

• • • A 10 -kg ball is accelerated 500 m/s 2 by

• • • A(n) _____ causes objects to move in a circle. a.

• Air rushing against an airplane is an example of ______ friction. •

• Newton’s 2 nd law states the relationship of mass, acceleration, and force.

• The motion of any object remains the same unless an outside _____

• Forces can be added together to find net force only if they

• • • The amount of matter in an object is called its

• What is the force on a 30 kg block accelerating at 3

• Everything that has mass exerts a gravitational pull on every other thing.

• • • The unit of force, a newton, is equal to a.

• According to Newton’s 2 nd law of motion, acceleration increases as force

• What are the forces on the sail car if the system of

• The force of friction acts between all objects that exist in the

• If a dinosaur and a limousine fall off a cliff at the

• What force is needed to accelerate a 25 kg cart at 12

• • • Which body exerts the greatest gravitational pull on Earth? a.

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Forces, Newton’s Laws Review Game

• The force exerted by gravity is stronger if two objects are closer. • Truth!

• Weight is the measure of the force of _____ on an object. • Grrrrravitay!

• What action/reaction forces act on an apple as it falls through the air? • Action: it pulls on the Earth; Reaction: the Earth pulls on the apple.

• Friction acts in a direction ______ to the direction of an object’s motion • a. unrelated • b. opposite • c. equal • d. perpendicular • b! Opposite!

• • • An object in free fall ______ until it reaches terminal velocity. a. decreases in mass b. slows down c. accelerates d. is unbalanced c! accelerates!

• • • A(n) ____ can cause an object’s motion to change a. unbalanced force b. balanced force c. weight d. inertia a! unbalanced force!

• A newton is the unit that goes with measurements of _____. • Forxe!

• • • A 10 -kg ball is accelerated 500 m/s 2 by a force of: a. 5000 N b. 50 N c. 500 N 1/50 N a! 5000 N! (calculation: 10 -kg x 500 m/s 2)

• • • A(n) _____ causes objects to move in a circle. a. centripetal force b. large weight c. terminal velocity d. acceleration a! centripetal force!

• Air rushing against an airplane is an example of ______ friction. • Floowid!

• Newton’s 2 nd law states the relationship of mass, acceleration, and force. It says that • a. force equals mass times acceleration • b. force equals acceleration divided by mass • c. force equals mass times acceleration • d. every object attracts every other object in the universe • a! F = ma!

• The motion of any object remains the same unless an outside _____ acts on the object. • Furce!

• Forces can be added together to find net force only if they are acting on different objects. • LIES! (Forces must be acting on the same object to make a net force. )

• • • The amount of matter in an object is called its a. weight b. force c. inertia d. mass d! mass!

• What is the force on a 30 kg block accelerating at 3 m/s 2? (No units to your answer makes it wrong. ) • 30 kg x 3 m/s 2 = 90 N

• Everything that has mass exerts a gravitational pull on every other thing. Why don’t you notice the gravitational force of all the objects around you? • Everything around us is on the Earth, which has the biggest mass and therefore the biggest gravitational pull.

• • • The unit of force, a newton, is equal to a. the amount of mass in an object b. mass x velocity c. kg (m/s) d. kg (m/s 2) d! kg (m/s 2)!

• According to Newton’s 2 nd law of motion, acceleration increases as force increases, if mass stays the same. • TRUTH! Force up, acceleration up!

• What are the forces on the sail car if the system of forces simply comes from 1) the fan behind the car, and 2) the air in the classroom? • pushing force from the fan, air resistance (fluid friction) against the sail

• The force of friction acts between all objects that exist in the universe. • LIES! That’s gravity, not friction.

• If a dinosaur and a limousine fall off a cliff at the same time on the earth, • a. the dinosaur would hit the ground first because it weighs more. • b. the limousine would hit the ground first because it’s smaller. • c. the dinosaur would hit the ground first because it has less air resistance than the limo. • c! the dinosaur has less air resistance!

• What force is needed to accelerate a 25 kg cart at 12 m/s 2? • 25 kg x 12 m/s 2 = 300 N

• • • Which body exerts the greatest gravitational pull on Earth? a. Mars b. Mercury c. Saturn a! Mars!