Friction, Gravity, And Magnetism Question Preview (ID: 34609)
Friction, Gravity, And Magnetism.
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What is the name of Newton's first law of motion?
a) law of inertia
b) law of acceleration
c) law of objects at rest
d) law of opposing forces
What does Newton's second law of motion describe?
a) inertia
b) an action causing a reaction
c) the relationship between force, mass, and acceleration
d) an outside force stopping or changing an object's speed or direction
An object stays at rest until what happens to it?
a) Inertia releases it.
b) Gravity overcomes friction.
c) Friction builds up and moves the object.
d) An outside or unbalanced force acts upon the object.
What is acceleration?
a) change in velocity/change in time
b) change in distance/change in time
c) change in mass/change in volume
d) change in pressure/change in time
What is the formula for force?
a) Force= mass * velocity
b) Force= mass * acceleration
c) Force= mass/acceleration
d) Force= acceleration/mass
A 10 kg falling object accelerates downward at 9.8 meters per second per second. What is the force acting on the object.
a) 9.8 N
b) 10 N
c) 98 N
d) 100 N
How much force is needed to accelerate a 2000-kg car at 5 meters per second?
a) 400 N
b) 500 N
c) 1000 N
d) 10000 N
When no friction is involved, what can an outside force do to a moving object?
a) nothing.
b) change the object's speed only.
c) change the object's direction only.
d) change the object's speed or direction.
Which force tries to pull all things toward the core?
a) Magnetism
b) Gravity
c) Friction
d) Thrust
In magnetism, which pole of a magnet will repel a south pole?
a) A north pole.
b) A south pole.
c) Both a north and a south pole.
d) Neither a north nor a south pole.
Which object would require the greatest amount of force to move one meter?
a) 25 kg of ice
b) 2 kg of cement
c) 25 g of toilet paper
d) 500 mg of aspirin
If a force is applied to the side of a MOVING object, the object will ____________.
a) The object will speed up
b) The object will drop
c) The object will turn
d) The object will stop.
What reduces the effects of friction?
a) gravity
b) lubrication
c) wind
d) rocks
What material should be used on a bicycle ramp to increase friction?
a) glass
b) ice
c) wood
d) carpet
If a force is applied in the SAME direction an object is moving, the object will __________.
a) Stop
b) Remain the same speed
c) Slow down
d) Speed up
What is the name of the force that is caused by two surfaces rubbing together to produce heat?
a) magnetism
b) friction
c) force
d) gravity
Which force is needed to help stop a child from slipping on ice?
a) gravity
b) magnetism
c) force
d) friction
Which of the following contains two non-contact forces?
a) Gravity and magnetism
b) Gravity and friction
c) Friction and magnetism
d) Force and friction
What is the most reasonable explanation for why a toy car travels further on a wood floor than on thick carpet.
a) The carpet has more friction to slow down the car.
b) The wood floor has more friction to speed up the car.
c) The surfaces are made of the same texture.
d) The surface allow the car to travel equal distance.
Which of the following materials is magnetic?
a) wood
b) metal
c) silver
d) iron
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