gsci 101

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Claims that appear to be pseudoscience should be?: tested experimentally
The re-creation of an event by comparing two situations in which all the factors are identical except one is called a?: controlled experiment
A tentative scientific explanation which may or may not be rejected upon further experimentation is called a?: hypothesis
An object accelerates when it slows or its direction of movement changes. (True or False): True
In the equation v=d/t, v represents: average speed
A car traveling at 20 mph on a curved exit ramp has: constant speed and variable velocity
60 mph would convert to?: 26.8 m/s
If you double the mass of an object while an unbalanced force remains constant?: the acceleration of the object is halved
Ignoring air resistance, the velocity of a falling object?: is constantly increasing
When you roll a ball across the floor, it comes to a stop because you are no longer exerting a force on it? (True or false): false
The weight of a 50-kg box is closest to?: 500 N
The tendency of a moving object to remain in unchanging motion in the absence of an unbalanced force is called?: inertia
A 1-kg ball is thrown at 10 m/s straight upward. Neglecting air resistance, the net force that acts on the stone when it is halfway to the top of its path is about?: 10 N
A 10-N falling object encounters 4 N of air resistance. The net force on the object is?: 6 N
A 2000-kg car experiences a braking force of 10,000 N and skids to a stop in 6 seconds. The speed of the car just before the brakes were applied was?: 30 m/s
A 1000-kg automobile enters a freeway on-ramp at 20 m/s and accelerates uniformly up to 40 m/s in a time of 10 seconds. How far does the automobile travel during that time?: 300 M
A baseball player bats a ball with a force of 1000 N. The reaction force that the ball exerts against the bat is?: 1000 N
A car accelerates at 2 meters/s/s. Assuming the car starts from rest, how far will it travel in 10 s?: 100 m
An object falls freely from rest on a planet where the acceleration due to gravity is twice as much as it is on Earth. In the first 5 seconds it falls a distance of?: 250 m
Arnold Strongman and Suzie Small each pull very hard on opposite ends of a massless rope in a tug-of-war. The greater force on the rope is exerted by?: both the same
A 10-kg brick and a 1-kg book are dropped in a vacuum. The force of gravity on the 10-kg brick is?: 10 times as much force as the force on the 1-kg book
A ball is thrown upwards and returns to the same position. Compared with its original speed after release, its speed when it returns is about?: the same
A block is dragged without acceleration in a straight-line path across a level surface by a force of 6 N. What is the force of friction between the block and the surface?: 6 N
A hockey puck is set in motion across a frozen pond. If ice friction and air resistance are neglected, the force required to keep the puck sliding at constant velocity is?: zero
A horse gallops a distance of 10 kilometers in a time of 30 minutes. Its average speed is?: 20 km/hr
A large and a small person wish to parachute at equal terminal velocities. The larger person will have to?: get a larger parachute
A rock weighs 30 N on Earth. A second rock weighs 30 N on the moon. Which of the two rocks has the greater mass?: the one on the moon
If less horizontal force is applied to a sliding object than is needed to maintain a constant velocity?: the object eventually slides to a stop
You should "follow through" when hitting a ball because?: of the relationship between Δp = F Δt
Suppose you slowly, and at constant speed, lift a book weighing 12 N from the floor to a shelf 2 m above the floor. Neglect air resistance. While you are lifting, the net force on the book is?: zero
A 10-N block and a 1-N block lie on a horizontal frictionless table. To provide them with equal horizontal acceleration, we would have to push with?: 10 times as much force on the heavier block
A automobile and a baby carriage traveling at the same speed collide head-on. The impact force is?: the same for both
A player catches a ball. Consider the action force to be the impact of the ball against the player's glove. The reaction to this force is the?: force the glove exerts on the ball
An object is pulled northward by a force of 10 N and at the same time another force of 15 N pulls it southward. The magnitude of the resultant force on the object is?: 5 N
The human body can, under certain conditions, withstand an acceleration of 10 g. What net force would produce this acceleration of a 50-kg person?: 5000 N
Two billiards balls, each of mass m, move towards each other at same speeds, v and collide head on. Their combined momentum after the collision is?: 0
"Energy" could best be defined as?: the capacity to do work
A 2000 N car travels 50 m along a level road, powered by a drive force of 1000 N. The work done by the drive force is?: 50,000 J
In its monthly bill, the electric company charges you primarily for?: the electric energy you consume every month
If work was done on an object, the object must have?: changed its position
How much work do you do when you lift a 3 N apple by 2 m during a time of 6 s?: 6 J
In order for you to get out of bed with the least amount of work, would it be better for your bed to be on the floor or a meter high?: It would be better for the bed to be a meter high, because then you would not need to do as much work in lifting yourself to your feet.
n order to quadruple an object's kinetic energy, we must?: double its speed
Nearly all of the energy consumed today is provided by petroleum, coal, hydropower and nuclear sources. (true or false): true
One joule is the same as one: one newton-meter
he energy transformation that occurs during downhill skiing is?: grav E leads to kin E + therm E.
Two students stand poised to leap off a high dive structure into the swimming pool below. Student B is twice as massive as student A. Which of the following is true?: student B did twice as much work climbing to the top of the structure
Which of the following energy transformations represents the operation of a wind turbine [a device that uses the wind as an energy resource]?: Kin E leads to Electric E
basic SI unit for mass: Kilogram
basic SI unit for distance: meter
basic SI unit for time: second
Average Speed: your total distance traveled divided by the total time traveling
Instantaneous Speed: your speed at a given instance
Velocity: speed and direction
Difference between speed and velocity: relates to vectors and arrows. same lengths=same speeds different directions=different velocities
Acceleration: change in velocity divided by the time taken
Newton's first law of motion: If no external forces act on a moving object, then its motion will continue on without changing.
Newton's second law of motion: If a force F is applied to an object of mass m, the object experiences a nonzero acceleration a in the direction of the applied
Why do things accelerate?: Objects will continue to move in the same direction and at a constant speed unless a force is applied
mass: amount of matter in an object
weight: is the force gravity exerts on a body
Newton's third law of motion: For every applied force, there also occurs a force of equal magnitude acting in the opposite direction at precisely the same point.
Action force (example): you pushing on a wall with your hand
reaction force (example): the wall pushes back on your hand with an equal and opposite force

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Number of cards 64