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Question: Learning Goal: To practice Problem-Solving Strategy 5.2 Newton's Second Law: Dynamics of Particles.
You want to move a heavy box with mass 30.0 kg across a carpeted floor. You pull hard on one of the edges of the box at an angle 30 degrees above the horizontal with a force of magnitude 240N , causing the box to move horizontally. The force of friction between the moving box and the floor has magnitude 41.5 N . What is the box's acceleration just after it begins to move?
Find both the x and y components of the acceleration of the box.
A normal walking speed is around 2.0 m/s . How much time t does it take the box to reach this speed if it has the acceleration 5.54 m/s^2 that you calculated above?
in a heart pacemaker a pulse is delivered to the heart 81 times per minute. the capacitor that controls this pulsing
a beam of light is incident from air on the surface of a liquid. if the angle of incidence is 25.5deg and the angle of
A figure skater begins spinning counterclockwise at an angularspeed of 4.7 π rad/s. during a 4.9 s interval, she slowly pulsher arms inward and finally spins at 8.2 π rad/s. what is heraverage angular acceleration during this time interval?
Ground beef may be irradiated with high-energy electrons from a linear accelerator to kill pathogens. Estimate the temperature increase of the beef due to this procedure
A proton traveling at 3.20x104 m/s is further accelerated by a potential difference so as to reduce its de Broglie wavelength to one-third of its original value. How much voltage is required to accomplish this?
A homogeneous sphere S, a uniform cylinder C, and a thin pipe P are in contact when they are released from rest on the incline shown. Knowing that all three objects roll without slipping, determine, after 6 s of motion, the clear distance between
An object is acted on by a drag force with a magnitude that is proportional to the speed. The object accelerates downward at 3.00 m/s2 when it is falling with a speed 20.0 m/s. What is the terminal speed of the object as it is falling.
Four identical springs with k= 67.1kN/m support a car, with the car's weight distributed equally among them. Find the maximum weight for the car
A 30 kg girl, skating at 6 m/s, collides with her 80 kg father who is initially standing still. What is their speed after the collision
(a) find the initial velocity of the second projectile, (b) find the maximum horizontal distance of the second projectile, and (c) find the maximum height each
Four identical charges (+4.0 µCeach) are brought from infinity and fixed to a straight line. The charges are located 0.20 m apart. Determine the electric potential energy of this group.
What is the radius of the smallest possible circular orbit that a proton with the kinetic energy equal to 3.9MeV can have in a 1 T magnetic field
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