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...

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...

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 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...

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...

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?...

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...

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...

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...

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?

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...

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?

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

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.

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...

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

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

assume that the force exerted by your arms is the same in both cases

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...

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