Thanks to recent satellite data, we know that the North American continent is drifting westward at a speed of about 1cm/yr. We can assume that the solid part of a continent is about 50 kilometers thick. Estimate the kinetic energy that the continental US has as a result of this motion.

Q: A 2.5 kg bowling ball is tied to a 1m long string attached to the ceiling. The ceiling is 5 m above…

A: Data Given ,  Mass of the ball ( m ) = 2.5 kg Height above the earth surface ( h )  = ( 5 - 1 ) m =…

Q: A child is standing on top of a 15ft hill, getting ready to run down all the way to the bottom. If…

A: Introduction: The energy of a body is stored in the form of potential energy due to the height…

Q: Kangaroos have very stout tendons in their legs that can be used to store energy. When a kangaroo…

A: According to the law of conservation of energy, for an isolated system energy can be destroyed nor…

Q: 09: A person trying to lose weight by burning fat lifts a mass of 10 kg up to a height of 1 m 1000…

A: Given : Lifting mass = 10 kg Height = 1m Number of times = 1000 Energy supplied by fat per kg…

Q: A block of mass ? = 200 g is released from rest from the top of a frictionless ramp. As the block…

A: Given : Mass of the object, m = 200 g Acceleration due to gravity, g = 9.8 m/s2 Height at which mass…

Q: A leaky bucket which initially has 20 L of water and leaks at a constant rate is hanging from a 60 m…

A:

Q: A block of mass 1kg is given a velocity of 5m/s on a horizontal flat surface. What will be the…

A: B

Q: In the figure, a 4.5 g ice flake is released from the edge of a hemispherical bowl whose radius r is…

A: Given,  radius of bowl= 24 cm or 0.24 m Mass of flake= 4.5 gram mass of flake in second case= 4.5*6=…

Q: e. A wind tunnel test on an 89 gg starling showed that the bird used 12 WW of metabolic power to fly…

A: Given: The bird flies for about 1 hour The metabolic power = 12 WW. A migrating starling flies…

Q: Kangaroos have very stout tendons in their legs that can be used to store energy. When a kangaroo…

A:

Q: Kangaroos have very stout tendons in their legs that can be used to store energy. When a kangaroo…

A: From the graph its shows that human runs below the line of kangaroo at 4m/s, which means the human…

Q: This time, the pendulum is 1.89 m long and has a mass of 3.24 kg. You give it a push away from…

A: The length of the pendulum is 1.89 m. The mass of the pendulum is 3.24 kg. The speed of the pendulum…

Q: After the lockdown due to Covid-19, Ezekiel a 10year-old kid of mass 40kg starts to have an outdoor…

A:

Q: A 40.5 kg box initially at rest is pushed 4.40 m along a rough, horizontal floor with a constant…

A:

Q: A raindrop of mass 28.7 mg forms inside a cloud, and then starts to fall from a height of 707.1 m…

A:

Q: A bird (m=250g) is flying through the sky at 10m/s, if the birds total energy is 1000J, what is his…

A: Given data:  Mass (m) = 250 g = 0.250 kg Velocity (v) = 10 m/s Total Energy (TE) = 1000 J  Required:…

Q: In the figure, a 4.1 kg block is accelerated from rest by a compressed spring of spring constant 660…

A:

Q: A golf ball is dropped from a 50 meter tall building. These suckers are quite bouncy... but not…

A:

Q: A 50-g ball is released from rest 40 m above the surface of the Earth. During the fall the total…

A: Given: The mass of the ball is m=50 g, The height of the ball above the surface of the Earth is…

Q: Which of these is closest to the amount of potential energy stored in a 6 kg mass sitting 5 m off…

A:

Q: A 35.5 kg box initially at rest is pushed 5.75 m along a rough, horizontal floor with a constant…

A: Given: Mass of the box, m = 35.5 kg Distance pushed by force, k = 5.75 m Horizontal force, = 130 N…

Q: mpact extinction 65 million years ago over 50% of all species became extinct, ending the reign of…

A:

Q: Kangaroos have very stout tendons in their legs that can be used to store energy. When a kangaroo…

A:

Q: A 36.0 kg box initially at rest is pushed 5.45 m along a rough, horizontal floor with a constant…

A: Given values: Mass, m=36.0 kg Applied force, F=150 N Coefficient of friction, μ=0.300 Distance,…

Q: When you ride a bicycle at constant speed, almost all of the energy you expend goes into the work…

A: Given:- mcyclist+bicycle= 60 kg v2= 10 m/s FD = 10 N  when the speed was 5 m/s d= 1 km = 1000 m

Q: In the figure, a 4.2 kg block is accelerated from rest by a compressed spring of spring constant 650…

A:

Q: A 69.7-kg boy is surfing and catches a wave which gives him an initial speed of 1.60 m/s. He then…

A: We have givenMass of boy = 69.7 kg Initial speed (u)= 1.60 m/s  Droping  height (h)= 1.64 mFinal…

Q: Flapping flight is very energy intensive. A wind tunnel test on an 89 g starling showed that the…

A: Write the given values, and determine the energy released by the bird.

Q: This time, the pendulum is 1.51 m long and has a mass of 3.01 kg. You give it a push away from…

A:

Q: A 71.1-kg boy is surfing and catches a wave which gives him an initial speed of 1.60 m/s. He then…

A:

Q: The internal energy of a 5-kg suitcase starts at 150 kJ. The suitcase is mangled as it travels…

A: Given data, Internal energy of the suitcase = 150 kJ Work done on the suitcase = 10 kJ Heat loss…

Q: A 0.5 kg block slides on a rough horizontal table top. Just before it hits a horizontal ideal spring…

A:

Q: This time, the pendulum is 1.55 m long and has a mass of 3.05 kg. You give it a push away from…

A:

Q: A 71.6-kg boy is surfing and catches a wave which gives him an initial speed of 1.60 m/s. He then…

A:

Q: 1) A constant horizontal force of F = 200.0 N pushes a crate of mass m = 25.0 kg, initially at rest,…

A: Applied force is Mass of object is Distance traveled by object is Cofficient of friction is…

Q: 4) A roller coaster of mass 80.0 kg is moving with a speed of 20.0 m/s at position A as shown in the…

A: