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

Q: dropping an elephant and a mouse from a tall building, the mouse survived the fall but the elephant…

A: A mouse and an elephant dropped from same height.  We have to explain as to why mouse survived the…

Q: A friend drops a 0.625-kg basketball from 2.6 m above you. What is force exterted by your hands to…

A: In this question we are given that a friend drops a 0.625-kg basketball from 2.6 m above you and we…

Q: After firing a cannon ball, the cannon moves in the opposite direction from the ball. This an…

A: Given that, After firing a cannonball, the cannon moves in the opposite direction from the ball.

Q: What happens to the weight reading on a scale you stand on when you toss a heavy object upward?

A:

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: Walking on horizontal slippery ice can be much more tiring than walking on ordinary pavement. Why?

A: Introduction: A frictional force always acts opposite to the direction of motion if the surface has…

Q: Which fall faster, large or small raindrops?

A: It's conventional wisdom in atmospheric science circles: large raindrops fall faster than smaller…

Q: A helicopter pushes air down, which in turn pushes the helicopter up. Which force affects the…

A: When the fans of the helicopter rotates, it pushes air down.  As the air is pushed down, due to an…

Q: . An astronaut on a space walk discovers that his jet pack no longerworks, leaving him stranded 50 m…

A:

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: When you release an inflated but untied balloon, why doesit fly across the room?

A: The untied balloon flies across the room because of the momentum carried by the air present inside…

Q: Vhat Have I Learned So Far? that the vessel cruises the water at a speed of 5 m/s. water? Solution:

A: By concept of relative motion 1) V = 5+1 = 6m/s  2) V = 5-1 = 4m/s

Q: In raising a 5000-N piano with the pulley system, the workers note that for every 2m of rope pulled…

A: The work is equal to the force time the distance.

Q: • Hit water in a tub with your full palm. Your full palm represents a swimmer doing a belly flop. •…

A: Hit water in a tub with your full palm. Your full palm represents a swimmer doing a belly flop.…

Q: Where do you weigh more—at the bottom of Death Valley or atop one of the peaks of the Sierra Nevada?…

A: Weight of an object is the gravitational force experienced by the object.

Q: The mass of an object is a measure of its a. force O b. gravity O c. energy O d. inertia

A: The mass of an object is the measure of its inertia because we know that inertia is the resistance…

Q: I want to check the answers of this question especially when does the weight first reach its maximum…

A:

Q: An acorn falls from

A: Kinetic energy = (1/2) mv2  Potential energy = mgh

Q: Scissors for cutting paper have long blades and short handles, whereas metal-cutting shears have…

A:

Q: A 2-kg mass starts from rest and slides down an inclined plane 80 cm long in 0.5 s.

A:

Q: In the hydraulic machine shown, you observe that when the small piston is pushed down 10 cm, the…

A: The displacement times the force for both the piston is the same.

Q: Why is a Ping-Pong ball kept in midair by a vertical jet of air?

A: As per Bernoulli’s equation, a moving vertical jet of air causes a low pressure region. So, the…

Q: What is a airplane that can stay in the air the longest and fly the farthest?

A: The factors like structure, weight, design can be helpful to fly longest and farthest.

Q: Large birds like pheasants often walk short distances. Small birds like chickadees never walk. They…

A: The maximum walking speed is limited by the size of the legs of the animals. the maximum walking…

Q: In raising a 5000-N piano with a pulley system, the workers note that for every 2 m of rope pulled…

A: The equation for the work done is given by,

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: In order to swim, a person pushes the water backward, why?

A: According to Newton’s 3rd law, action force and reaction force are equal in magnitude and opposite…

Q: On her way to visit Grandmother, Red Riding Hood sat down to rest and placed her 1.20-kg basket of…

A:

Q: What is the advantage to a gymnast of being short in stature?

A:

Q: A 3 KG hammer is 0.4m high. What is it’s PE? What is it’s KE?

A: Potential energy is given byP.E=mghwherem=mass of objectg=acceleration due to gravityh=height of…

Q: When does the ball reach its maximum height?

A: Answers  are   (a) 1.28 seconds  (b) 11.08 meters  Explanation is in next step .

Q: Why should a person buy a ping pong compression spring ping pong ball launcher

A: In this question we have to use kinetic energy as well as potential energy concept which would…

Q: A rope is used to lower a bucket of water downward into a well at a constant speed. Fora Frens Fgrev…

A:

Q: You awaken in the chance to save yo bedroom door and window. You happ Superball next to y only time…

A: Force is given by,

Q: When a cannonball is shot into the air through an explosion, the cannon shooting the cannonball is…

A: Cannon moves backward after shooting the ball

Q: You know two forces are balanced if the net force is.....

A: Two forces are balanced means both forces have same magnitude and opposite direction. According to…

Q: Which one is not a component of Physical Fitness * O Muscular Flexibility O Muscular Endurance…

A: We know there are five components of physical fitness.

Q: A golf ball is released from rest from the top of a very tall building. Calculate the locity of the…

A:

Q: against which it can push?

A: Rockets and engines in space work according to Newton's third law of motion i.e Every action has an…

Q: If a 1 kg ball and a 5 kg ball of the same size are dropped from a height of 3 m at the same tims…

A: The air resistance of a falling object depends on the area of the cross-section. Therefore more the…

Q: what is the significance of the “rise” and the “run “and their ratio?

A: The distance measured in the up or down direction is known as the rise. The distance measured in the…

Q: Which requires more food per body weight daily: an elephant or a mouse?

A: For a mouse, there is a greater amount of radiating area per kg of body weight, compared to an…

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.