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When a book falls from a shelf to the ground without anyone pushing it Is work is being done on the book?
Wiki User
∙ 12y ago
Work is being done by the force of gravity.
When the book falls to the floor, there's a force on it, and the force keeps acting on it as it covers the distance. A force acting through a distance is the definition of work. Maybe there's nobody pushing the book, but the force of gravity is pulling it down, and it's the force of gravity that does the work on the book.
Wiki User
∙ 12y ago
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How friction is useful in pushing a car?
If you are behind a car, about to push it forward from a resting position, you will need to exert a force on the car to accelerate it from resting position. While you are pushing against the car, however, there will be a reaction force pushing back at you. In order to produce a large net force against the car without being pushed backward yourself, you need to increase the friction of your feet against the ground...so that the frictional force between your feet and the ground prevents you from sliding backward. The combinations of the frictional force and your force pushing forward against the car will cause the car to move forward. The frictional force of the car being moved from resting position also has to be overcome, of course.
What is a examples of a pushing force?
pushing a pram kicking a ball pushing the door pushing the car
What is the action and reaction force during blowing a balloon?
Air fill the balloon and force it to expand but being a rubber base substance the balloon always in the state of pushing the air (that's why if you put a hole on a balloon it will "fly"). Air pushing is an action. Balloon pushing back is a reaction.
Which is the force that pulls a ball to the ground after being dropped?
Gravity.
Why people is more likely to fall on the cement ground than the rough cement ground?
on the rough ground they are being careful and looking for disturbances but they expect the smooth ground to have no flaws so don't bther worrying
How can Adrian do a assement without siturbing anyone?
by being quiet
How friction is useful in pushing a car?
If you are behind a car, about to push it forward from a resting position, you will need to exert a force on the car to accelerate it from resting position. While you are pushing against the car, however, there will be a reaction force pushing back at you. In order to produce a large net force against the car without being pushed backward yourself, you need to increase the friction of your feet against the ground...so that the frictional force between your feet and the ground prevents you from sliding backward. The combinations of the frictional force and your force pushing forward against the car will cause the car to move forward. The frictional force of the car being moved from resting position also has to be overcome, of course.
Does gravity effect a marble's speed?
yes,the gravity is always pushing down on the marble,therefore it is going forward while it is being pushed down against the ground
Can you tow an automatic 2004 vibe?
No, not without the front wheels being off the ground.
Did anyone escape from Auschwitz?
About 300 prisoners escaped from Auschwitz without being recaptured.
Why when a plant grow upside down it will die?
plants are just as likely to die upside down as they are rightside up, only being effected by gravity pushing it down to the ground.
Can a runner return to first base on a ground ball without being out?
No, when a ball is hit on the ground, the runners must try and advance to the next base.
How can you drop from high places without being hurt?
You use a parachute and you learn how to roll when you hit the ground.
A pile of DVDs sitting on the ground has a weight of 10 N With what force is the ground pushing back on them?
shouldn't y'all have he answers up here all ready dis is answer . com rite so stopp being dumb and get to workin yhu piece of crap
Can betta live without being fed for three days - we have to leave Thursday morning and will return Sunday afternoon - is that pushing it?
Your Betta will be OK for 3 days no worries.
How does someone become abusive?
anyone can become abusive by being abused themselves or being stressed out really bad. they can have problems that eats them up inside and without warning are ready to take it out on anyone who comes at them wrong.
What is a examples of a pushing force?
pushing a pram kicking a ball pushing the door pushing the car
