2.3. A crate of mass 50 kg slides on a horizontal floor under the action of an applied horizontalforce of 200N and against a friction force of 120 N. Calculate (a) the acceleration, and (b) theapplied horizontal force required to give the same acceleration with twice the mass and half thefriction.2.4. Calculate the force required to accelerate an electron from a speed of 100 m/s to 100 km/s inthe same direction in a distance of 5.0 cm. The mass of an electron is 9.1X10" kg.2.5. A horizontal force of 300 N is required to maintain constant velocity of a vehicle on thelevel, and a force of 1 100N gives it a speed of 6.0 m/s in a time of 5.0s from rest. What force isrequired for half the speed in double the time, assuming constant resistance?2.6. A car of mass 750 kg is accelerated from rest by a constant force of 500 N for a distance of200 m. Calculate the maximum speed reached and the brake force required to stop the car in adistance of 20 m.2.7. It is reckoned that the driver of a vehicle with good brakes on a dry road may take a distanceof 25 m to stop from a speed of 50 km/h in a sudden emergeney. Of this distance, 10 m iscovered during the driver's reaction time, Calculate (a) the reaction time, and (b) the resultantforce on a driver of 75 kg if he remains in his seat and the brake force is constant duringapplication.

Given: (a) Mass of the crate: m=50 [kg] Applied force: Fa=200 [N] Frictional force: Ff=120 [N] (b)…

2.3. A crate of mass 50 kg slides on a horizontal floor under the action of an applied horizontal force of 200 N and against a friction force of 120 N. Calculate (a) the acceleration, and (b) the applied horizontal force required to give the same acceleration with twice the mass and half the friction.

2.3. A crate of mass 50 kg slides on a horizontal floor under the action of an applied horizontal force of 200 N and against a friction force of 120 N. Calculate (a) the acceleration, and (b) the applied horizontal force required to give the same acceleration with twice the mass and half the friction.

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter6: Applications Of Newton's Laws

Section: Chapter Questions

Problem 6.4CYU: Check Your Understanding The soccer player stops after completing the play described above, but now...

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