A bowling ball with an initial velocity of 3m/s rolls along a level floor for 50 m before coming to stop. What is the coefficient of rolling friction?
Gravitational force
In nature, every object is attracted by every other object. This phenomenon is called gravity. The force associated with gravity is called gravitational force. The gravitational force is the weakest force that exists in nature. The gravitational force is always attractive.
Acceleration Due to Gravity
In fundamental physics, gravity or gravitational force is the universal attractive force acting between all the matters that exist or exhibit. It is the weakest known force. Therefore no internal changes in an object occurs due to this force. On the other hand, it has control over the trajectories of bodies in the solar system and in the universe due to its vast scope and universal action. The free fall of objects on Earth and the motions of celestial bodies, according to Newton, are both determined by the same force. It was Newton who put forward that the moon is held by a strong attractive force exerted by the Earth which makes it revolve in a straight line. He was sure that this force is similar to the downward force which Earth exerts on all the objects on it.
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![PROBLEM SETS: FRICTION
Solve what is asked the given problems. Show compiete process and box the final answer. Round off
final answer to the nearest hundredths.
1. A force of 50N is needed to push a 250N load on the floor, what is the coefficient of friction?
2. A 50-kg box is pulled with uniform speed along a horizontal floor by a force parallel to the floor.
The coefficient of friction is 0.30. find the magnitude of the force.
3. A 50-kg box is placed on an inclined plane making an angle of 30 ° with the horizontal. If the
coefficient of kinetic friction is 0.3, what is the resultant force on the box?
4. A 15 -kg box is placed on an inclined plane making an angle of 5° with the horizontal, Calculate
the force needed to pull the mass up the plane if the coefficientof kinetic friction is 0.20.
5. A box is given a push so it slides with the horizontal floor. If the coefficient of kinetic friction is
0.2 and the push gives the box an initial velocity of 4m/s, how far will the box go?
6. How much force is needed to keep a 1200-kg car moving at constant velocity on a level concrete
road? (uk= 0.04)
7. A force of 200 N is just sufficient to start a 50 kg steel trunk moving across a wooden floor. Find
the coefficient of static friction.
8. A 40 kg wooden crate is being pushed across a wooden floor with a force of 160 N. If uk= 0.3,
find the acceleration of the crate.
9. A bowling ball with an initial velocity of 3m/s rolls along a level floor for 50 m before coming to
stop. What is the coefficient of rolling friction?
10. The coefficient of kinetic friction and wet concrete road is 0.5.
a. Find the minimum time in which the car whose initial velocity is 50km/h can come to a
stop on such a road.
b. What distance will the car cover in this time?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fee92e88d-b340-421e-b096-06aa9a748c06%2F85deeda6-f3dc-4330-9a7a-e37b0e064a2e%2Fl7jyeat_processed.png&w=3840&q=75)
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