174 Answered Questions for the topic Forces

Forces Physics

05/29/16

Balanced or Unbalanced
For each situation, determine whether the forces acting on a roller coaster are balanced or unbalanced and explain why using physics terms please:   The roller coaster moves at a constant... more
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03/07/16

Solving for Centripetal Force using an Free Body Diagram
Gabriella (75  kg) rides a roller coaster. What is her acceleration at the top of the vertical loop if she feels like her weight is 1200N?   What is Gabriella's acceleration at the... more
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03/03/16

Explaining physics
A girl twirls a key chain in a circle if she twirls it faster, she finds that she holds the chain tighter. Explain why this is necessary.   I think it's that she has to hold the chain tighter... more
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Forces

01/19/16

The maximum force that the handles on a grocery bag....
The maximum force that the handles on a grocery bag can withstand and not rip is 250 N.a. If 20 kg of groceries are lifted from the floor to the table with an acceleration of 5 m/s2, will the bag... more
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Forces

01/19/16

The space shuttle has a mass of 2.0 x 106 kg. At lift-off, the engines...
The space shuttle has a mass of 2.0 x 106 kg. At lift-off, the engines generate an upward force of 3.0 x 107 N.a. What is the acceleration of the shuttle? b. If the shuttle is in outer space with... more
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Forces

01/19/16

A tow-truck is trying to pull a 1.4 x 103 kg car out of some mud. The coefficient of static friction...
A tow-truck is trying to pull a 1.4 x 103 kg car out of some mud. The coefficient of static friction is 0.76. What force will the tow truck have to apply to the car before it will start to move?
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Forces

01/19/16

A car is travelling at 120 km/hr when it slams on the brakes...
A car is travelling at 120 km/hr when it slams on the brakes.a. How long is the skid mark if the coefficient of friction is 0.62? (hint: convert km/hr to m/s) b. Explain why a more massive car... more
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Forces

01/19/16

To slide a metal puck across a greased sheet of metal at constant speed....
To slide a metal puck across a greased sheet of metal at constant speed requires a force of 0.525 N. If the force of gravity on the puck is 5.00 N, what is the coefficient of friction between the... more
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Forces

01/17/16

A 50-N applied force...
A 50-N applied force (pulling 30 degrees up from the horizontal) accelerates a 5 kg box across a horizontal floor.a. What is the normal force on the box?b. If the coefficient of friction between... more
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Forces

01/17/16

A 25 kg box is pulled across a wooden floor...
A 25 kg box is pulled across a wooden floor with a rope. The rope makes an angle of 30o with the floor. The coefficient of friction between the box and floor is 0.21. A force of 75 N is exerted on... more
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Forces

01/17/16

What is the net force on a mass....
What is the net force on a mass if the force of 100 N at 53o AND a force of 120 N at 135o act on it at the same time?
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Forces

01/17/16

Bob pulls on a 10 kg mass with a force of 40.0 N North...
Bob pulls on a 10 kg mass with a force of 40.0 N North. Sally pulls at the same time on the mass with a force of 30.0 N West. What will be the resulting acceleration if the mass is on a... more
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Forces Physics Mass Equal

12/07/15

How do the forces required to stop each dummy compare?
Two safety dummies (of equal mass) are being used to test seat belts. Dummy A has a wide seat belt, and Dummy B has a narrow seat belt. Both dummies are crashed into a barrier while in the same... more
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12/07/15

How do the forces required to stop each dummy compare? How does the pressure on each dummy compare?
Two safety dummies (of equal mass) are being used to test seat belts. Dummy A has a wide seat belt, and Dummy B has a narrow seat belt. Both dummies are crashed into a barrier while in the same... more
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Forces

12/01/15

Physics Forces
a 985kg dragster, starting from rest, attains a speed of 43.6 m/s in 0.82 seconds. what is the acceleration of the dragster?
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11/01/15

What are forces acting upon him?
If I were to draw a free body diagram on the "headless horseman" looking for his head, what forces would be acting upon it? Please label and explain.   Thank you
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10/22/15

A 35 Newton force is used to push a 12 kilogram desk a distance of 10 meters. What is the work done on the desk?
A 35 Newton force is used to push a 12 kilogram desk a distance of 10 meters. What is the work done on the desk?   Show work please.
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Forces Physics Torque

06/19/15

Physics: Torque multiple choice question
In comparing two unequal forces on a rigid body, is it possible to have the larger force produce less torque than the smaller force?     a. Yes b. No
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05/19/15

find gravitational force
A planet has ? the density of earth but 2x the radius. find the surface gravitational force on this planet. (Hint: Earth’s is 10N/Kg)
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Forces Vectors

05/16/15

Using a vector diagram, why is it easier to do chin ups when your hands are 30 cm apart instead of 90cm apart?
assume that the force exerted by your arms is the same in both cases
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04/15/15

Please help me out with these 3 questions or as much as possible!! Thanks
does a planet travel faster when it is nearer the sun  or farther from the sun? what is the gravitational attraction between a dating couple sitting 0.152 m apart if the boy weighs 715 N and the... more
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Forces

04/03/15

unit of force?
United in si
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Forces

11/28/14

A box of mass 22 kg slides down a 22o slope with a coefficient of friction of 0.13. Find:
A box of mass 22 kg slides down a 22o slope with a coefficient of friction of 0.13. Find:a)the weight of the boxb) the normal force on the boxc) the frictional force on the boxd) the total force on... more
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Forces Speed Thrust

10/15/14

Thrust from a stationary mounting
If a propeller, on a stationary mounting, blows back 36kg of air per second at a speed of 45 knots, what thrust does it produce?
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Forces

07/02/14

acceleration c/o physical science
2.  if you are using a hammer to  hit a stake into the ground why will the acceleration of the hammer be less than the acceleration of the stake?   a.  force of the hammer is greater than the... more
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