What is induced drag on wings? Can induced drag be minimized by using long and narrow wings or short and wide wings?

Q: You are snowboarding down a hill at 13 m/s when you start sliding across a frozen lake. The…

A: Velocity of the snow boarder is v = 13 m/s Friction force acting on the snow boarder is Ff = 22 N…

Q: The hummingbird shown here must beat its wings repeatedly to hover over flowers and drink nectar.…

A: The hummingbird must overcome the gravitational force. The flapping wings of the bird causes…

Q: What is net force on 1-N apple when you hold it at rest above your head? What is net force on it…

A: When the apple is at rest above the head, it is in stable equilibrium. The net force on an object in…

Q: all black with mass 0.0700 kg slides in a vertical cir r track. There is no friction bětween the…

A: Mass of block = 0.0700 kg  Circular path radius R = 0.800 m  Normal force at bottom Nb = 4.00 N

Q: You walk into an elevator, step onto a scale, and push the "down" button to go directly from the…

A: Given Data: The normal weight is: w=635 N The elevator move with constant speed (v=0). So, the…

Q: A 2000 Kg car travels from rest to a speed of 25 m/s on a flat stretch of road. What is the force…

A: Given: The mass of the car is 2000 kg. The initial velocity of the car is 0 m/s. The final speed of…

Q: by applying brakes. The retarda

A: Given: Acceleration of car: a=-4 m·s-2 Time needed to stop, t=20 s Final velocity, v=0

Q: You are going sledding with your friends, sliding down a snowy hill. Friction can’t be ignored.…

A: Figure for the given explanation.

Q: What happens to your weight if you are in an elevator traveling upward at a constant speed? Explain…

A: Given that the elevator is moving up with a constant velocity which means there is no acceleration.…

Q: An 800N person stands on a scale in an elevator. The elevator should read_________than 800N when it…

A: The correct option is option 4  more, equal

Q: An 87.8 kg cross country skier glides down a small hill with a constant slope of 30.3 degrees.  Find…

A:

Q: An 800N person stands on a scale in an elevator. The elevator should read_ _than 800N when it starts…

A: Given: Person weighs inside the elevator =800 N We know, At rest, normal force on elevator will be,…

Q: A high flying jet cruises at an altitude of 30,000 feet at a constant velocity of 700 km/h. The…

A: Given Height of jet = 30000 feet Velocity of  jet = 700 km/h = constant The force applied by jet…

Q: the crumple zone exerts +200,000 N of force on the wall, how much force will the wall exert on the…

A: The crumple zone exerts +200,000 N of force on the wall. We need to find how much force will the…

Q: A person stands on a scale inside an elevator at rest. The scale reads W=666 N. The elevator moves…

A: from the second law of motion F=ma here  F=force acting on the person by the surface of the elevator…

Q: A 75kg person is standing on a scale in an elevator. What is the reading of the scale in newtons if…

A:

Q: carefu 4. What is g-force? coasters cause a. A pulling force b. A measure of gravity c. Something…

A: Question: What is g-force?

Q: A ball that weighs 0.5kg is suspended on a string from the top of a vertical pole fastened to the…

A: Given: The mass of the ball is 0.5 kg. The acceleration of the vehicle is 2.7 m/s2. The freee-body…

Q: When landing after a spectacular somersault, a 30.0 kg gymnast decelerates by pushing straight down…

A: The mass of the gymnast, m=30.0 kg The deceleration of the gymnast, a=7·g

Q: Bill gets a job delivering pizzas. The pizza companymakes him mount a sign on the roof of his car.…

A: The additional drag force is,

Q: 14. What will the spring scale read for a 55kg student in an elevator that moves upward with a…

A: Mass of the student, m = 55 kg Acceleration due to gravity, g = 9.81 m/s2   Since the speed is a…

Q: What is drag force? Distinguish between viscous drag and high speed drag.

A:

Q: What is a force? O A push or a pull O Any movement O Gravity only O Energy

A:

Q: On a 119 meter high roller coaster is a 75 kg car at rest. Assuming there is no friction, what will…

A:

Q: You push a 12 kg block with a force of 32 N for a distance of 4.1 m. If it started from rest, how…

A:

Q: What is drag? What causes it? Why do we usually try to minimize it?

A:

Q: what is mutual force

A: Force is a vector quantity which has both directions and magnitude .

Q: A motorcyclist is able to ride on the vertical wall of a bowl shaped track, as shown. Does…

A:

Q: The diagram bellow shows two masses, a 50kg mass on a ramp at 50° with a coefficient of friction of…

A:

Q: When landing from a jump a 65 kg individual generates an average upward force of 1000 Newtons for a…

A:

Q: corite is cap- tuied by the Earth's gravitational field. Determine the speed with which it will…

A: Apply energy conservation.

Q: A paratrooper with his parachute weighs 200lbs falls freely from a great height before opening his…

A: Given: The mass of the paratrooper: m = 200 lbs his terminal velocity is vT = 175 ft/s The air…

Q: A 15kg light fixture is held up by a rope.  Calculate the tension in the rope.

A: The tension is acting upwards from the mass m. The system is in static equilibrium.

Q: How is the force of attraction dependent on the masses of objects and distance between them?

A: Gravitational force is an attractive force which depends on the mass of objects and the distance…

Q: You've seen a movie at some time when there were skydivers falling through the air, spread out,…

A: You've seen a movie at some time when there were skydivers falling through the air, spread out,…

Q: 10. A 65-kg diver jumps off of a 10.0-m tower. a. Find the diver's velocity when he hits the water.…

A:

Q: accelerates from rest to a speed õf A man weighs 900 newtons standing on a scale in a stationary…

A:

Q: VA person lifting and raising a dumbbe OA snowboarder travelling down a fric OLifting a 1kg box…

A: Which of the following are examples of non-zero work?    Find:- Choose all that apply. A person…

Q: If you push a 3Kg book across your desk at a constant speed of 2 m/s with a force of 7N what is the…

A:

Q: A 1.0 kg ball at the end of a 2.0 m string swings in a vertical plane. At its lowest point the ball…

A: Given A 1.0 kg ball at the end of a 2.0 m string swings in a vertical plane. speed of 10 m/s We have…

Q: A boulder has a mass of 17.3 kg. When it falls from its precarious position on a cliff edge, it…

A: The magnitude of force exerted by the Earth on the boulder through gravity is

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.