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Help with physical science hw? ten points!?

how do you combine displacement?

if bob walks 2 blocks east, 4 blocks south and 2 blocks west what is his displacement?

a. 2 blocks south

b. 4 blocks south

c. 2 blocks south, 2 blocks east

d. 4 blocks south, 2 blocks east

alex rode his motor 600 meter sin 15 seconds, how fast did he go?

jessica ran speed 5/5 ms for a total of 120 seconds. how far did she go?

which state is true about an object in free fall?

a. object has a constant velocity

b. has a constant acceleration

c. acceleration of object increases as it falls

d. velocity decreases as acceleration decreases as it falls

thank u!!!

3 Answers

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  • 8 years ago
    Favorite Answer

    2 right, 4 down, 2 left. Left and right cancel out.

    b. four blocks south

    speed = distance/time

    speed = 600/15

    speed = 40m/s

    distance = speed x time

    distance = 5.5 x 120

    distance = 660m

    depends. most probably b. has a constant acceleration, but only upto a certain point when the object begins to have large drag forces, causing the acceleration to decrease, as the object nears terminal velocity.

  • 8 years ago

    1) B

    2) 40 Meters PS, or .025 MPH

    3)660 Meters if the number you meant to write is 5.5 instead of 5/5, if it is 5/5 then its a total of 120.

    4)A, because the rate of free fall on Earth is fixed at 9.8 m/s/s.

    Objects cannot B,C, or D in free fall since free fall only occurs without wind resistance.

  • Anonymous
    4 years ago

    a million. d 2. i can in ordinary terms supply you concepts. as an occasion, physics is in contact in only about all components of lifestyles which includes blood pass by capillaries. Diffusion of oxygen from the air to the lungs, then from blood to tissue. The ideas communicates using electric powered impulses. our bodies are produced from an identical components as non lining be conscious and are undertaking to comparable forces alongside with electrostatic forces that shop electrons of their orbit around the atoms. 3. because west is a in ordinary terms a directional call that became into created and agreed upon, the remark may be seen regulation. there is not any data that the sunlight contraptions someplace else, and there is data which would be examined that the sunlight does set west and not north or east. 4. There are 3 considerable figures. it incredibly is precise to 3 considerable figures. IF the quantity became into measured different situations and reported an identical element, it is likewise precise, IF it became into measured as quickly as, you won't be able to confirm no matter if it incredibly is precise.

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