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A 21 kg suitcase is being pulled with constant speed by a handle that is at an angle of 30 degrees above the horizontal.
a.)If the normal force exerted on the suitcase is 180 N , what is the force F applied to the handle? At the local grocery store, you push a 14.0 kg shopping cart. You stop for a moment to add a bag of dog food to your cart. With a force of 13.0 N , you now accelerate the cart from rest through a distance of 2.30 m in 2.65 s.
b.) What was the mass of the dog food?
A copper cable is designed to carry a current of 400.00 A with a power loss of 2.00 W/m. What is the required radius of this cable
A car started frm rest and accelerated for 5s at 6.00m/s2.Then it stayed at a constant speed for 20 s. It next slowed down at 3m/s2 until it came to a stop? how far did it travel during the first 5 s.
What are the rocket's horizontal range, greatest height, and total time of flight. The magnitude of the torque of this force on the door with respect to the hinge is most nearly .
An object weighing 338 N in air is immersed in water after being tied to a string connected to a balance. The scale now reads 302 N. Immersed in oil; object weighs 313 N. Calculate the density of the object.
Skater A, with unknown mass and unknown initial speed, bumps into stationary Skater B, mass 60.0 kg. What was the mass and initial speed of Skater A
A parallel plate capacitor has plates of area A and seperation of d and is charged to a potential difference of V.Derive expressions for the new potential difference
Two wheels have the same mass and radius of 4.5 kg and 0.39 m, respectively. determine the net external torque that acts on each wheel
A 2.5-kg block is attached to a spring with k=100 N/m and compress it with a distance of 0.40 m. What is the mechanical energy of the block
the solar constant is the radiant flux density from the sun at the earth's surface and is about 0.135 W/cm^2 when the sun is directly overhead, find the amplitude of the E and B fields
Two sources produce electromagnetic waves. What is the energy of a photon from source B
An astronaut on the Mars attaches a small brass ball to a 1.00- length of string and makes a simple pendulum. She times 13 complete swings in a time of 35.4 seconds. From this measurement she calculates the acceleration due to gravity on the Mars.
A coil of inductance 70 mH and unknown resistance and a 0.85 µF capacitor are connected in series with an alternating emf of frequency 980 Hz. what is the resistance of the coil
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