a.) What is the smallest force parallel to the incline needed to keep the sofa from sliding down? b.) What parallel force is required to keep the sofa moving up the incline at a constant...

a.) What is the smallest force parallel to the incline needed to keep the sofa from sliding down? b.) What parallel force is required to keep the sofa moving up the incline at a constant...

When I calculating resultant force in equilateral triangle why there is square root vector formula we will put?

You are a roller coaster engineer, and safety inspectors tell you that your roller coaster has too much centripetal force. What can you do to decrease the centripetal foce acting on your roller...

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...

What conclusion can you draw about the force required to move the cart and the distance in a cart that moves along a ramp to attain your specific height?

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...

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...

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...

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...

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?...

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...

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...

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...

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...

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?

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 frictionless...

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 car...

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 car...

Describe the historical development of the concepts of gravitational, electromagnetic, weak nuclear, and strong nuclear forces, please.

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?

Dan C.

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