Forces and Newton’s Laws: Practice Once again: everybody fights, nobody quits.
Newton’S Laws Practice
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Transcript of Newton’S Laws Practice
Newton’s LawsNewton’s Laws
PracticePractice
11
• The kilogram is a measure of an object’s:
• A) weight
• B) gravity
• C) force
• D) mass
22
• Whirl a rock at the end of a string and it follows a circular path. If the string breaks, the tendency is of the rock is to:
• A) continue to follow a circular path
• B) follow a straight line path
33
• A sheet of paper can be withdrawn from under a milk carton without toppling it as long as the sheet is pulled quickly. This demonstrates:
• A) gravity tends to hold the carton to the ground
• B) the carton has inertia• C) for every action there’s an equal
reaction
44
• Your weight is:
• A) a property of mechanical equilibrium
• B) actually your mass
• C) the gravitational attraction between your body and the earth
55
• One object has twice as much mass as another object, and also has twice as much:
• A) volume
• B) velocity
• C) inertia
• D) gravitational acceleration
66
• Jupiter has 3 times the gravitational force of Earth. So on Jupiter, a 100kg object would have a mass of:
• A) 100kg
• B) 30kg
• C) 300kg
• D) 600kg
77
• An object weighs 20lbs on the Earth, another object weighs 20lbs on the moon. Which object has more mass?
• A) Object on the Earth
• B) Object on the Moon
• C) Not enough information to say
88
• The law of inertia applies to:
• A) objects at rest
• B) objects in motion
• C) both moving and nonmoving objects
99
• A force is a vector quantity because it has both:
• A) mass and acceleration
• B) action and reaction counterparts
• C) magnitude and direction
1010
• 10kg brick and a 1kg brick are dropped in a vacuum, the force of gravity on the 10kg brick is:
• A) zero
• B) 10 times as much as the 1kg brick
• C) the same as the 1kg brick
1111
• An object is propelled along a straight-line path. If it’s force were doubled, then it’s acceleration would:
• A) halve
• B) quadruple
• C) double
• D) stay the same
1212
• An object is propelled in a straight-line path by a force. If the mass of the object is somehow doubles, it’s acceleration:
• A) halves
• B) quadruples
• C) doubles
• D) stays the same
1313
• An object is pulled northward at 20N and southward at 15N. What magnitude of the net force?
• 75N
• 10n
• 0N
• 15N
1414
• A 10N falling object encounters 10N of air resistance. The magnitude of the net force is:
• A) 100N
• B) 10N
• C) 0N
• D) Infinite
1515
• An apple is held at rest above your head. The magnitude of the net force of the apple is:
• A) 10N
• B) 0N
• C) 100N
• D) between 10N and 0N
1616
• Which has zero acceleration? An object_____
• A) at rest
• B) changing its direction
• C) changing its speed
• D) all of these
1717
• Whenever the net force on an object is zero, the acceleration
• A) may be zero
• B) is zero
1818
• A car has a mass of 3000kg and accelerates at 2 m/s/s. What is the magnitude of the force exerted on the car?
• 1500N
• 3000N
• 6000N
• 2000N
1919
• A tow truck exerts a 2 m/s/s acceleration on a car with a force of 300N. The mass of the car is
• A) 600N
• B) 3000kg
• C) 150kg
• D) 1500kg
2020
• A girl pulls a 10kg wagon with a constant force of 300N. What is the wagon’s acceleration in m/s/s?
• A) .3
• B) 3000
• C) 30
• D) 1/30
2121
• Whenever an object exerts a force on another object, the second object exerts a force of the same magnitude but in the opposite direction.
• A) Always true
• B) Sometimes true
• C) Usually true
2222
• A high school student hits a nail with a hammer. During the collision there is a force:
• A) On the hammer but not the nail
• B) On the nail but not the hammer
• C) On both hammer and nail
2323
• Forces always occur:
• A) in singles
• B) in pairs
• C) in triplets
• D) in space
2424
• A rocket is able to propel itself in in the vacuum of space by firing its engines. The force that propels the rocket is:
• A) The exhaust gasses pushing on space
• B) The exhaust gasses heating up the ship
• C) The exhaust gasses rushing away from the ship
2525
• An archer shoots an arrow. Consider the action force to be the bowstring pushing against the arrow. The reaction force is:
• A) air resistance pushing against the arrow
• B) the grip of the archers hand on the bow
• C) the push of the arrow against the bowstring
• D) none of these
2626
• A baseball player bats a ball with a force of 1000N, the ball exerts a reaction force against the bat of
• A) 100N
• B) 1000N
• C) A little less than 1000N
• D) Not enough information
2727
• As the ball falls, the action force is the mass of the earth pulling on the ball. The reaction force is
• A) the ball’s pull on the earth
• B) nonexistent in this case
• C) the pull of the opposing fans’ minds
• D) air resistence
2828
• A karate chop delivers a blow of 3,000N to a board that breaks. The force that acts on the hand is actually:
• A) more than 3000N
• B) less than 3000N
• C) exactly 3000N
• D) depends if the board was oak or ash
2929
• Arnold Strongman and Suzy Small pull hard in opposite directions in a tug of war. The greatest force on the rope is exerted by:
• A) Suzy, suprisingly
• B) Arnold, of course
• C) both the same
3030
• Are you getting tired of questions about Newton’s Laws?
• A) No way, I love Physics!
• B) No, I can do this all day
• C) Please give me more questions!!!