Physics Review First Quarter Question Preview (ID: 48684)
Review Linear Motion And Newton's Laws.
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Which quantity is scalar?
a) mass
b) velocity
c) acceleration
d) force
Which object has the greatest inertia?
a) a 1.0-kilogram object moving at 15 meters per second
b) a 5.0-kilogram object at rest
c) a 10.-kilogram object moving at 2.0 meters per second
d) a 15-kilogram object at rest
A 2.0-kilogram object is falling freely near Earth’s surface. What is the magnitude of the gravitational force that Earth exerts on the object?
a) 20. N
b) 0.20 N
c) 2.0 N
d) 0.0 N
Compared to the force needed to start sliding a crate across a rough level floor, the force needed to keep it sliding once it is moving is
a) greater
b) less
c) the same
d)
A carpenter hits a nail with a hammer. Compared to the magnitude of the force the hammer exerts on the nail, the magnitude of the force the nail exerts on the hammer during contact is
a) less
b) greater
c) the same
d)
The speedometer in a car does not measure the car’s velocity because velocity is a
a) vector quantity and has a direction associated with it
b) vector quantity and does not have a direction associated with it
c) scalar quantity and has a direction associated with it
d) scalar quantity and does not have a direction associated with it
A satellite weighs 200 newtons on the surface of Earth. What is its weight at a distance of one Earth radius above the surface of Earth?
a) 400N
b) 800N
c) 50N
d) 100N
A person is standing on a bathroom scale in an elevator car. If the scale reads a value greater than the weight of the person at rest, the elevator car could be moving
a) downward at constant speed
b) upward at constant speed
c) downward at increasing speed
d) upward at increasing speed
If the magnitude of the gravitational force of Earth on the Moon is F, the magnitude of the gravitational force of the Moon on Earth is
a) smaller than F
b) larger than F
c) equal to F
d)
As an object falls freely, the acceleration of the object
a) increases
b) descreases
c) remains the same
d)
As an object falls freely, the velocity of the object
a) increases
b) decreases
c) remains the same
d)
A hiker travels 1.0 kilometer south, turns and travels 3.0 km west, and then turns and travels 3.0 km north. What is the total distance traveled by the hiker?
a) 3.2 km
b) 3.6 km
c) 5.0 km
d) 7.0km
If a block is in equilibrium, the magnitude of the block’s acceleration is
a) zero
b) decreasing
c) increasing
d) constant, but not zero
A 100.-kg cart accelerates at 0.50 m/s2 west as a horse exerts a force of 60. newtons west on the cart. What is the magnitude of the force that the cart exerts on the horse?
a) 10. N
b) 60N
c) 50N
d) 110N
What does the area under a velocity time graph represent?
a) momentum
b) acceleration
c) displacement
d) speed
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