Science Vocab and Questions: Ch 19 Flashcards

1
Q

The speed and direction of a moving objects is it’s

A

velocity

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2
Q

The distance an object an object travels in a certain amount of time is it’s

A

speed

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3
Q

The rate of change of velocity over time is

A

Acceleration

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4
Q

The tendency of an object to maintain its state of motion is

A

inertia

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5
Q

when a boy lands on a trampoline.what is the reaction force?

A

The boy pushing down

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6
Q

The diagram shows a force acting on an object. what is the direction of the objects accelation?

A

Opposite to the force

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7
Q

What force helps you stop when you’re skateboarding?

A

friction

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8
Q

A worm crawls 2 meters in 2 hours. What is the worm’s speed?

A

1m/hr

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9
Q

which of the following is NOT part of Newton’s second law?

A

position

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10
Q

A girl ice-skates in a circle at a constant speed of 10km/hr. What part of her motion is changing?

A

Velocity

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11
Q

Which of the following DOES NOT cause a car to accelerate?

A

brakes

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12
Q

If you were a bicycle racer, what feature would you use for in a bike?

A

low mass

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13
Q

A balloon rises at a rate of 2 km/hr. What is its velocity?

A

2 km/hr, upward

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14
Q

If you walk on a log floating in water, the log moves backward. Which of the following explains this?

A

Newton’s third law

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15
Q

A truck, a car, a motorcycle, and a train are all moving at the same speed. Which has the most momentum?

A

A truck

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16
Q

Which two factors make up momentum?

A

mass and velocity