1. Estimate the order of magnitude (exponential power) for the number of grains of salt in a salt shaker.

6. The world record for falling out of an airplane, without a parachute and surviving is 10,000m. If b is 0.13 N(s/m)^2, what is the terminal velocity of this person, assuming she has a mass of 70 kg?

9. consider pushing a box across a rough surface. The box has a mass of 50.0 kg, and you are applying a force of 49.0 N to move the box with a constant velocity. Draw a picture, identify all the forces acting, define a coordinate system. Then find the magnitude of all the forces acting, and find the coefficient of kinetic friction.

10. Consider a box, with a mass of 10.0 kg, sitting, at rest, on an inclined plane, which makes an angle of 15 degree with respect to the ground. Draw a picture, identify all the forces acting, define a coordinate system. Then find the magnitude of all the forces acting, and find the coefficient of static friction. Finally, assume that you push the box up the incline with a force of 50N. What is the acceleration of the box?

Solution Summary

All steps shown along with the equations/assumptions used.

... of static friction is µs= 0.44, and the coefficient of kinetic friction is µk ... The expert examines five problems on velocity, acceleration and frictions. ...

... means it will move with increasing velocity. ... The coefficients of static and kinetic friction between the ... N Thus the limiting (maximum static) friction force on ...

... force, and if so, what will be the block's acceleration? ... The coefficients of static and kinetic friction are 0.760 and ... a rough road at a constant velocity by a ...

... At this moment, the velocity of the shell is. So the kinetic energy of the shell is. ... The solution explains how to calculate the linear velocities of the ...

... kg, what is the magnitude of the acceleration of the ... daughter on a sled with a constant velocity on a ... 35 kg and the coefficient of kinetic friction between the ...

... solving for acceleration, force, tension, and velocity. ... The coefficients of static and kinetic friction are 0.650 ... if so, what will be the block's acceleration? ...

... (b) moving up at a constant velocity 2.00m ... If the coefficient of static friction between the crate and the plane is 0.65, will the ... (a) What is its kinetic energy ...

... be 0.82[m s-1]. 2 seconds later, you measure the velocity to be ... The change in Kinetic Energy is -0.108845 [J]. What is the force of friction measured in ...

... to B. The coefficient of kinetic friction between A ... and an equal and opposite (forward) friction force will ... accelerate it till both will have same velocity. ...

... As the block is moving on the surface with constant velocity (zero acceleration), the force applied F is just equal to the kinetic friction and thus we have. ...