# gsci 101

### 64 terms by flyerstrong

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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

hypothesis

True

average speed

### A car traveling at 20 mph on a curved exit ramp has

constant speed and variable velocity

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

false

500 N

inertia

10 N

6 N

30 m/s

300 M

1000 N

100 m

250 m

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

the same

6 N

zero

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

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

5 N

5000 N

0

### "Energy" could best be defined as?

the capacity to do work

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

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.

double its speed

true

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

Kilogram

meter

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

Example: