A dog pulls a sled that is 10 kg, the dog goes from 0-12 m/s in 4 seconds. What is the force that the dog exerts on the sled in Newtons? Give answer to the nearest 0.1 Newtons.
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- When a 644lb boat is moving at 10ft per sec, the motor conks out. how much farther will the boat glide, assuming its resistance to motion is 2 v lb where v is feet per secondsA 1.50-kg steel ball is dropped from a plane to an ocean. If the velocity of the ball just before reaching the water is 11 m/s and if the resistance in the water is 2.8v, what is the distance travelled by the object after 3.3 seconds? Answer in four decimal places. differential equationWhat is the weight of a pound mass on earth’s surface, where the acceleration due to gravity is 32.2ft/s2 and on the moon’s surface where the acceleration is 5.31ft/s2 ?
- Determine the amount of work done by you and a friend when each of you push on a car that has run out of gas. Assume you and your friend each push with a horizontal force with a magnitude of 200 N, a distance of 100 m.A mass of 3.9kg is projected with a speed of 4.7m/s up a plane inclined 38 degrees with the horizontal. If coefficient of kinetic friction is 0.27, determine the distance it will travel before it stops. Note: use 3 decimal placesWhen a 644-lb boat is moving at 10 ft per sec, the motor conks out. How much farther will the boat glide, assuming its resistance to motion is 2 v lb where v is in feet per second?
- A child does 350 j of work while pulling a box from the ground up to his tree house at a steady speed with light rope. The tree house is 4.0 m above the ground .What is in kg, the mass of the boxA mass of 3.0kg is projected with a speed of 5.6m/s up a plane inclined 33 degrees with the horizontal. If coefficient of kinetic friction is 0.21, determine the distance it will travel before it stops.NOTE: use 3 decimal placesA grindstone in the shape of a solid disk with diameter 0.520 m and a mass of 50.0 kg is rotating at 850 rev/min. You press an axe against the rim with a normal force of 160 N (see Figure below), and the grindstone comes to rest in 7.50 s. What is the moment of inertia of the grindstone? What force is bringing the grindstone to a stop? What is the net torque caused by that force? What is the size of the force? What is the coefficient of friction between the axe and the grindstone?
- The coefficient of static friction between a book and a desk surface is 0.6. The book weighs 20 N. If a horizontal force of 10 N is applied to the book, would the book move? And if not, what is the magnitude of the friction force? What should be the magnitude of the horizontal force to set the book in motion?A pulley of radius 64 cm with a moment of inertia of 54.6 kg m^2, a rope wrapped around it is pulled with a force of 17.25 N. What is the magnitude of angular acceleration?Determine the amount of work done by you and a friend when each of you push on a car that has run out of gas. Assume you and your friend each push with a horizontal force with a magnitude of 200 N, a distance of 100 m. Also, suggest ways of actually measuring the magnitude and the direction of the pushing force.