iheartfood
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Questions Answered

iheartfood:
Group Title
A child drops his toy car from a 2nd floor window that is 7.3 meters high. Find the velocity of the toy car just before it hits the ground …
 updated one month ago
 26 replies
 2 Medals
Mathematics

iheartfood:
Group Title
A plane starting at rest at the south end of a runway undergoes a constant acceleration of 1.6 m/s/s for a distance of 1600m before takeoff.…
 updated one month ago
 9 replies
 1 Medal
Mathematics

iheartfood:
Group Title
A snowmobile has an initial velocity of 3.0 m/s
Part 1: If it accelerates at the rate of 0.5 m/s/s for 7.0 sec, what is the final vel.?
…
 updated one month ago
 13 replies
 1 Medal
Mathematics

iheartfood:
Group Title
A skater traveling at 7 m/s accelerates at the rate of .80m/s/s for an interval of 2.0sec. What is the final velocity?
***thank you!! :)
 updated one month ago
 32 replies
 2 Medals
Mathematics

iheartfood:
Group Title
2 Fermi Problems?
1) How many gallons of gasoline are used by cars each year in the country you live in?
…
 updated one month ago
 19 replies
 1 Medal
Mathematics

iheartfood:
Group Title
How many golf balls will fit in a suitcase? Any size is okay!
Fermi problem!
 updated one month ago
 48 replies
 3 Medals
Mathematics

iheartfood:
Group Title
Fermi problem?
Estimate the distance (in kilometers) that you walk and run during a typical week while going about your normal activities…
 updated one month ago
 18 replies
 2 Medals
Mathematics

iheartfood:
Group Title
Why would an observer out in space see the moon orbiting the earth rather than the earth orbiting the moon?
A. The earth's gravity pulls…
 updated 2 months ago
 6 replies
 1 Medal
Mathematics

iheartfood:
Group Title
What does it mean for a force to act in accordance with an inverse square law?
A. The force is directly proportional to the distance squa…
 updated 2 months ago
 9 replies
 1 Medal
Mathematics

iheartfood:
Group Title
Satellite A orbits the earth at a height of 2.00 times the earth's radius. Satellite B orbits the earth at a height 3.00 times the earth's r…
 updated 2 months ago
 9 replies
 1 Medal
Mathematics

iheartfood:
Group Title
Which is correct about the moon's motion around the earth?
A. The moon is in free fall.
…
 updated 2 months ago
 9 replies
 1 Medal
Mathematics

iheartfood:
Group Title
If you plotted vector arrows around a mass to represent gravitational field vectors, describe how the length of the arrows would change as t…
 updated 2 months ago
 4 replies
 1 Medal
Mathematics

iheartfood:
Group Title
A placekicker kicks a football upward at an angle of 20 degrees and a speed of 5.0 m/s. At what other angle will he have to kick a second ba…
 updated 2 months ago
 24 replies
 No Medals Yet
Mathematics

iheartfood:
Group Title
A spring has a spring constant of 100 N/m, and the mass hanging on it is 0.71 kg. What is the period of the spring's motion?
0.031 s, 0.4…
 updated 2 months ago
 7 replies
 1 Medal
Mathematics

iheartfood:
Group Title
The moon's gravity is onesixth that of the earth. What is the period of a 0.25 m long pendulum on the moon?
0.32 s, 1.0 s, 2.5 s, or 3.5…
 updated 2 months ago
 34 replies
 2 Medals
Mathematics

iheartfood:
Group Title
A CD spins at a constant angular velocity of 4.0 revolutions per second clockwise. Which of the statements about the CD is true?
A. No net …
 updated 2 months ago
 33 replies
 5 Medals
Mathematics

iheartfood:
Group Title
An astronaut lands on an alien planet. He places a pendulum (L = 0.200 m) on the surface and sets it in simple harmonic motion, as shown on …
 updated 2 months ago
 18 replies
 2 Medals
Mathematics

iheartfood:
Group Title
Which of the following is not true of the Speaker of the House?
A. The Speaker delegates legislation to subcommittees.
…
 updated 2 months ago
 7 replies
 1 Medal
Mathematics

iheartfood:
Group Title
A 10 kg barrel is lifted by pulling on a rope. The barrel accelerates at 1.50 m/s^2. Find the force of tension on the rope.
15 N, 98 N, 8…
 updated 2 months ago
 35 replies
 4 Medals
Mathematics

iheartfood:
Group Title
Which of these should a free body diagram of a car being driven along a highway include?
A. the force of the engine in turning the drives…
 updated 2 months ago
 10 replies
 2 Medals
Mathematics

iheartfood:
Group Title
A strong weightless rope has a mass m hanging from the middle of it (will draw inside!). The tension force on each rope is 25 N, and the rop…
 updated 2 months ago
 27 replies
 2 Medals
Mathematics

iheartfood:
Group Title
Two movers are pushing a large crate with a force of 60.0 N each. One pushes north, the other east. What is the equilibrant force?
A. 85 …
 updated 2 months ago
 15 replies
 1 Medal
Mathematics

iheartfood:
Group Title
Which of the following objects is in equilibrium?
A. an object that moves at constant acceleration
…
 updated 2 months ago
 25 replies
 2 Medals
Mathematics

iheartfood:
Group Title
What does it mean to say that the forces acting on an object are balanced?
A. The forces all have the same magnitude.
…
 updated 2 months ago
 18 replies
 1 Medal
Mathematics

iheartfood:
Group Title
A small lab cart and one of larger mass collide and rebound off each other. Which of them has the greater average force on it during the col…
 updated 2 months ago
 8 replies
 1 Medal
Mathematics

iheartfood:
Group Title
If the standard kilogram bar kept in Paris were subjected to a net force of 1 newton, what acceleration would it have as a result?
1 cm/s…
 updated 2 months ago
 5 replies
 2 Medals
Mathematics

iheartfood:
Group Title
How is the acceleration of an object in Newton's second law related to its mass and the net force on it?
A. acceleration is directly propor…
 updated 2 months ago
 12 replies
 6 Medals
Mathematics

iheartfood:
Group Title
If the crate (drawn inside!) is moving at a constant speed in a straight line and the force applied is 310 N, what is the magnitude of the f…
 updated 2 months ago
 33 replies
 1 Medal
Mathematics

iheartfood:
Group Title
Which of the four fundamental forces is mainly responsible for contact forces?
gravity, weak nuclear force, electromagnetic force, or str…
 updated 2 months ago
 13 replies
 2 Medals
Mathematics

iheartfood:
Group Title
Which best describes friction in the context of Newton's laws?
A. a force that opposes the relative motion of two objects in contact and…
 updated 2 months ago
 7 replies
 1 Medal
Mathematics
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