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Physics

Freda McKenzie ∙

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Term1/14

What is the length of the High Coast Bridge above water

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A rock falls off a bridge and hits the water 8 seconds later. How high is the bridge? A rock falls off a bridge and hits the water 8 seconds later. How high is the bridge?

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A rock is dropped from a cliff and hits the ground 6.0 seconds later How high is the cliff

Definition1/14

176.4 meters

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A hammer is dropped off a roof of an apartment building that is 80 meters high How long will it take to hit the ground

Definition1/14

The hammer will take square-root(2x80/9.8)= 4.04 seconds to hit the ground.

The distance is related to the time by s=v0t + 1/2 gt^2 where vo, the initial velocity is=0.

The answer is 4.04 or rounded is 4 seconds.

Term1/14

A baseball is hit straight up at an initial velocity of 150MS. what will be the baseballs speed when it hits the ground

Definition1/14

20.40

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A ball is thrown horizontally at 20 ms from the top of a cliff 50 meters high How long does it take the ball to reach the ground

Definition1/14

Use the equation [ D = 1/2 g t2 ] .

D = the distance of free-fall = 50 m

g = acceleration of gravity = 9.8 m/sec2

t = time in free-fall

D = 1/2 g t2

2D / g = t2

t = sqrt( 2D / g ) = sqrt( 100 / 9.8 ) = 3.1944 seconds(rounded)

The horizontal velocity that the ball has when it's launched doesn't appear

in the calculation, because it makes absolutely no difference in the result.

Any effects of air resistance have been ignored in arriving at this solution.

Term1/14

Two forces act on the same object One force is pushing due east with a force of 6 newtons and the other is pushing due north at 8 newtons What is the resulting force

Definition1/14

10 newtons NE. a little more north than east

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A ball is thrown horizontally from a cliff at a speed of 15 ms and strikes the ground 45 meters from the base of the cliff How long was the ball in the air

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Answer: 3 seconds

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A ball is thrown horizontally from a cliff at a speed of 15 ms and strikes the ground 45 meters from the base of the cliff How high was the cliff rounded to the nearest meter

Definition1/14

Answer: 44 meters

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During a baseball game the batter hits a high pop up directly over home plate If the ball stays in the air six seconds how high did the ball go

Definition1/14

176.4 meters

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In what type of orbits do planets move around the sun

Definition1/14

elliptical

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A football is thrown horizontally off the top of an apartment house that is 78.4 meters high the ball is thrown at a speed of 15 ms how far will the ball travel before hitting the streets below

Definition1/14

"60" or "sixty"

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A rifle is shot straight up and the bullet leaves the barrel at a speed of 245 m s How long will it take the bullet to hit the ground

Definition1/14

50 sec.

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What type of measurement is this the speed limit on an interstate highway

Definition1/14

scalar

Term1/14

What term is given to the net figure that results from vector

Definition1/14

resultant

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Cards in this guide (14)

What is the length of the High Coast Bridge above water

A rock falls off a bridge and hits the water 8 seconds later. How high is the bridge? A rock falls off a bridge and hits the water 8 seconds later. How high is the bridge?

A rock is dropped from a cliff and hits the ground 6.0 seconds later How high is the cliff

176.4 meters

A hammer is dropped off a roof of an apartment building that is 80 meters high How long will it take to hit the ground

The hammer will take square-root(2x80/9.8)= 4.04 seconds to hit the ground.

The distance is related to the time by s=v0t + 1/2 gt^2 where vo, the initial velocity is=0.

The answer is 4.04 or rounded is 4 seconds.

A baseball is hit straight up at an initial velocity of 150MS. what will be the baseballs speed when it hits the ground

20.40

A ball is thrown horizontally at 20 ms from the top of a cliff 50 meters high How long does it take the ball to reach the ground

Use the equation [ D = 1/2 g t2 ] .

D = the distance of free-fall = 50 m

g = acceleration of gravity = 9.8 m/sec2

t = time in free-fall

D = 1/2 g t2

2D / g = t2

t = sqrt( 2D / g ) = sqrt( 100 / 9.8 ) = 3.1944 seconds(rounded)

The horizontal velocity that the ball has when it's launched doesn't appear

in the calculation, because it makes absolutely no difference in the result.

Any effects of air resistance have been ignored in arriving at this solution.

Two forces act on the same object One force is pushing due east with a force of 6 newtons and the other is pushing due north at 8 newtons What is the resulting force

10 newtons NE. a little more north than east

A ball is thrown horizontally from a cliff at a speed of 15 ms and strikes the ground 45 meters from the base of the cliff How long was the ball in the air

Answer: 3 seconds

A ball is thrown horizontally from a cliff at a speed of 15 ms and strikes the ground 45 meters from the base of the cliff How high was the cliff rounded to the nearest meter

Answer: 44 meters

During a baseball game the batter hits a high pop up directly over home plate If the ball stays in the air six seconds how high did the ball go

176.4 meters

In what type of orbits do planets move around the sun

elliptical

A football is thrown horizontally off the top of an apartment house that is 78.4 meters high the ball is thrown at a speed of 15 ms how far will the ball travel before hitting the streets below

"60" or "sixty"

A rifle is shot straight up and the bullet leaves the barrel at a speed of 245 m s How long will it take the bullet to hit the ground

50 sec.

What type of measurement is this the speed limit on an interstate highway

scalar

What term is given to the net figure that results from vector

resultant

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Physics

An arrow is shot straight up at an initial velocity of 200 meters per seconds. How long will it be before beginning to fall

A rock is dropped from a cliff and hits the ground 6.0 seconds later How high is the cliff

A rock falls off a bridge and hits the water 8 seconds later How high is the bridge

A hammer is dropped off a roof of an apartment building that is 80 meters high How long will it take to hit the ground

Physics

A rock is dropped from a cliff and hits the ground 6.0 seconds later How high is the cliff

A hammer is dropped off a roof of an apartment building that is 80 meters high How long will it take to hit the ground

A baseball is hit straight up at an initial velocity of 150MS. what will be the baseballs speed when it hits the ground

A ball is thrown horizontally at 20 ms from the top of a cliff 50 meters high How long does it take the ball to reach the ground

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A ball is thrown horizontally at 20 ms from the top of a cliff 50 meters high How long does it take the ball to reach the ground

Two forces act on the same object One force is pushing due east with a force of 6 newtons and the other is pushing due north at 8 newtons What is the resulting force

A ball is thrown horizontally from a cliff and hits the ground 4 seconds later 40 meters from the base of the cliff How fast was the ball thrown

A ball is thrown horizontally from a cliff at a speed of 15 ms and strikes the ground 45 meters from the base of the cliff How long was the ball in the air

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