paul is pushing the couch up the ramp into the moving truck at a constant velocity
As shown below, two identical springs, each with the spring constant 20 N/m, support a 15.0-N weight. University Physics Volume 1 by OpenStax is licensed under a Creative Commons Attribution 4.0 International License, except where otherwise noted.
(b) The barrel of a recoilless rifle is open at both ends. In building a house, carpenters use nails from a large box.
If a constant force in the horizontal direction is causing this change in motion, find (a) the components of the force and (b) the magnitude of the force. Find the magnitude of the car’s acceleration. Mass is the quantity of matter in a substance. One way to do this is to exert a known force on an astronaut and measure the acceleration produced.
Assume that the mass of the system is 2.10×1032.10×103 kg, the thrust T is 2.40×104N,2.40×104N, and the force of friction opposing the motion is 650.0 N. (b) Why is the acceleration not one-fourth of what it is with all rockets burning? Suppose the mower is moving at 1.5 m/s when the force Fis removed. A body of mass 2.0 kg is moving along the x-axis with a speed of 3.0 m/s at the instant represented below. (b) What force applied upward along and parallel to the ramp would allow the block to move with constant velocity? A 0.0502-kg pair of fuzzy dice is attached to the rearview mirror of a car by a short string. The box is suspended from a spring twice during the day to measure the usage of nails. A truck collides with a car, and during the collision, the net force on each vehicle is essentially the force exerted by the other. What properties do forces have that allow us to classify them as vectors? (b) If an object has no weight, it must have no mass. Motion of many objects. Inertia is related to an object’s mass. (b) Find the magnitude of the net force if the mass of the car is 1050 kg, the initial speed is 40.0 km/h, and the stopping distance is 25.0 m. A sailboat has a mass of 1.50×1031.50×103 kg and is acted on by a force of 2.00×1032.00×103 N toward the east, while the wind acts behind the sails with a force of 3.00×1033.00×103 N in a direction 45°45° north of east. A mass of 250.0 g is suspended from a spring hanging vertically. When you stand on Earth, your feet push against it with a force equal to your weight. What is the magnitude of the force that motorcycle exerts backward on the ground to produce its acceleration if the mass of the motorcycle with rider is 245 kg? The driver attempts to get the car out of the mud by exerting a perpendicular force of 610.0 N, and the distance she pushes in the middle of the rope is 1.00 m while she stands 6.00 m away from the car on the left and 6.00 m away from the tree on the right.
She is pushed 2.50 m along the incline by a group of students who together exert a constant horizontal force of 600 N. (a) What is the force of friction between the losing player’s feet and the grass? a student is trying to push a fridge into a dorm room, but the fridge isn't moving. If an object has no weight, it must have no mass.
Find the magnitude and direction of the resulting acceleration. If the sprinter from the previous problem accelerates at that rate for 20.00 m and then maintains that velocity for the remainder of a 100.00-m dash, what will her time be for the race? (b) What is the velocity of the piano when it reaches the top if the ramp is 4.0 m long and the piano starts from rest?
How much will the spring stretch if the suspended mass is 530.0 g? Find the magnitude and direction of the retarding force that slows and stops the bullet.
Write an expression for the total distance the body travels in terms of the variables indicated. Taking a frame attached to Earth as inertial, which of the following objects cannot have inertial frames attached to them, and which are inertial reference frames? Find the magnitude and direction of the retarding force that slows and stops the bullet. A team of nine members on a tall building tug on a string attached to a large boulder on an icy surface. (a) Write an equation giving the vertical force he must apply to the pole. A 7.0-N force parallel to an incline is applied to a 1.0-kg crate.
If an object’s velocity relative to a given frame is constant, then the frame is inertial.
On June 25, 1983, shot-putter Udo Beyer of East Germany threw the 7.26-kg shot 22.22 m, which at that time was a world record. For a swimmer who has just jumped off a diving board, assume air resistance is negligible.
What is its acceleration in this case? If not, why not? (b) If his mass is 90.0 kg and he accelerates at 5.00 m/s. Assume that the mass of the system is 2.10 x 10, What is the deceleration of the rocket sled if it comes to rest in 1.10 s from a speed of 1000.0 km/h? A particle of mass 2.0 kg is acted on by a single force \(\vec{F}_{1}\) = 18 \(\hat{i}\) N. (a) What is the particle’s acceleration? Plugging in these forces gives you: Sample question. (a) If the shot was released at a height of 2.20 m with a projection angle of 45.0°45.0°, what was its initial velocity?
Newton’s second law can also describe net force as the instantaneous rate of change of momentum.
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