Why can small creatures fall considerable distances without injury ,while people need parachutes to do same?

Q: If you hit somebody from behind, his head seems to snap backwards. Why?

A: Force brings about motion and changes in it.  This force produce acceleration and hence the changes…

Q: If the net force on a 10 kg object is 40 N, what can we say about this object? The object will be…

A: Given data:  Mass (m) = 10 kg Net Force (Fnet) = 40 N Required:  Acceleration (a)

Q: Which has a higher friction: rubber on ice? or Aluminum on steel? Why?

A: Kinetic and Static coefficient of friction of rubber on ice: kinetic = 0.15  Static = 0.15

Q: Why Is It Difficult To Climb Up A Greasy Pole?

A: Grease decreases the friction between the surfaces in contact. While climbing up the pole, a person…

Q: How much force does a 15-kg leg exert during running if the person has a 2-m stride and runs at a…

A: Mass of the leg (m) = 15 kg Speed (v) = 8 m/s Energy = 1/2 m v2  .       E = (1/2 )× 15 × (8)2…

Q: er than the new born baby of 20 kg we

A: We know that the two terms of physics are force and pressure.  both are interrelated to each other…

Q: A parachute descends slowly. Why?

A: When any object falls from a height, gravity acts on it, which pulled it downwards, but the air…

Q: A woman was transporting an open box of cupcakes to a school party. The car in front of her stopped…

A: Given : A situation is given : A woman was transporting an open box of cupcakes to a school party.…

Q: Why is it that when you are climbing up a wall, you pull down on a hold to move upward?

A: yes, From newton 3rd law of motion which state that for every action there is equal and opposite…

Q: When Fatima rides her bicycle at 5 m/s, the drag force acting on her and her bicycle is 6 N. If she…

A:

Q: Why would it be a dangerous mistake for a bungee jumper to use a steel cable instead of an elastic…

A:

Q: If you carry a heavy bag of groceries and bang your hand against the wall, the concept that best…

A: Here, the situation is we carry a heavy bag of groceries and bang our hand against the wall , we…

Q: Why is it that a cat that accidentally falls from a 50-story building hits a safety net below with…

A: Any object which is in free fall in a fluid medium will attain a maximum velocity called as terminal…

Q: David rolled down the window on his car while driving on the freeway. An empty plastic bag on the…

A: The Bernoulli's principle states that for an in-compressible fluid, the sum of pressure energy,…

Q: which is faster in filling a bag with air, at rest or after exercise?

A: which is faster in filling a bag with air, at rest or after exercise

Q: Why we tend to fall forward when a car stops suddenly?

A: When the car is moving, our upper part is at rest but the lower part is moving in the forward…

Q: Two astronauts push each other as they float freely in the zero-gravity environment of space. Why?

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Q: Why is it difficult to walk on the wet marble floor?

A:

Q: football player runs without his knee and thigh pads. Discuss what will happen to him if he…

A: When any object fall on ground with some speed has some initial momentum after falling on the ground…

Q: Was it easier to push a fist into the bag with no water or into the bag with water?

A: Answer We can move easily through air than through water. If the road is full of water we can't…

Q: A standard elevator in a midrise building can hold a maximum weight of about 1.5 tons. Assuming an…

A:

Q: When we say that light objects and heavy objects fall at the same rate, what assumption are we…

A: If two objects , one light and one heavy object are falling in air medium then they fill a resistive…

Q: Why is it difficult for a firefighter to hold the hose that ejects large amounts of water at a high…

A: Water leaves at very high speed from the hose which is used by the firefighters. But as soon as the…

Special Relativity

The theory of special relativity discusses how space and time are related to objects traveling along a straight line at a constant speed. Simply stated, as an object reaches the speed of light, its mass becomes infinite and it is unable to move faster than light. This interstellar speed limit has been the topic of much debate in astronomy, and also in science fiction when people consider how to fly over large distances.