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A push on a 1-kg brick accelerates it. Neglecting friction, to equally accelerate a 10-kg brick, one would have to push with
A) one tenth the amount of force.
B) 100 times as much force.
C) Just as much force.
D) 10 times as much force.
E) None of these
2. A car drives west at 60 mph and then turns south driving at 60 mph for the rest of the trip. What is the direction of the average acceleration?(where we utilize the convention that north points in they direction and east points in the +direction.)
A) Southwest B) southeast C) northwest D) northeast
A laser emits a narrow beam of light. The radius of the beam is 1.5 mm, and the power is 2.9 mW. What is the intensity of the laser beam
A car coasts (engine off) up a 30 degree grade. If the speed of the car is 25m/s at the bottom of the grade, Compute the time it takes for the car to come to rest
A simple pendulum is made of a small blob of mass m = 9.500 kg attached to the end of an inextensible wire. What is the magnitude of the tension in the wire
1. a converging lens has a focal length of f 23 cm. an object is placed 44 cm from the lens. find the size of the
What is the velocity of a beam of electrons that go undeflected when passing through perpendicular electric and magnetic fields of magnitude 8.8 x 10^3 V/m and 3.5 x 10^-3 T respectively
A quarter circle of electric charge with a radius of 2.5 m has a uniform charge density of +0.7x10^-6 C/m. At the center of the circle is located a +0.3C charge
You buy a plastic dart gun, and being a clever physics student you decide to do a quick calculation to find its maximum horizontal range. What is the maximum horizontal range of your gun
A long solenoid with 12.8 turns/cm and a radius of 8.91 cm carries a current of 21.9 mA. What is the magnitude of the magnetic field there
q1. a baseball thrown at an angle of 55.0circ above the horizontal that strikes a building 18.0 rm m away at a point
q1. a home fragment found in a cave believed to have been inhabited by early humans contains 0.21 times as much14c as
Blocks A, B, and C are placed as in the diagram below and connected by ropes of negligible mass. What is the weight of block
The star Sirius is a distance of 8 light-years from the earth. If Sirius suddenly stopped shining, how much longer would it be seenon earth
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