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1.Tom has a mass of 70.0 kg. and Sally has mass of of 50 kg. Tom and sally are are standing 10.0 m apart on the dance floor find the size of the gravitational force. 2. If a torque of of 55.0Nm is requiredto turn a bolt and the largest force you can apply is 135N, how long is the lever? 3. The outer edge of a tire that has a radius of 45 cm has a velocity of 23 m/s. what is the angular velocity of of the tire in rad/s? 4. Two electrons, each with a charge of -1.6x10-19 C,in an atom are separated by 1.5x10-19 m.what is the electrostatic force between them? 5. A 60.0v battery is connected to a lamp, which has a resistance of 12.5Omega .how much current is flowing through the circuit? 6. A110 v electric iron draws a current of 3.0 A. How much power does the iron consume? 7. The driver of a 2175 kg. compact car applies the brakes hard for 2.0s.As a result, an average force of 5.0x 10 N is exerted on the car .What is change in velocity of the car? 8. An 1875 kg. car going 23m/s rear-ends a 1025 kg.compact car going 17 m/s in the same direction.The two cars stick together.how fast the two cars move after the collisiobn? 9. Marble A. mass50.0 g,moves at a speed of of 2 m/s West it collides with a second marble mass 100.0g, moving at 1m/s also West.What is the speed and direction of marble B after the collision? 10. A 150 g bullet is fired from a 4.5 kg. rifle, at rest .when the bullet leaves the barrel of the gun it is traveling at 645 m/s. With what velocity does the gun recoil,move back?
You are traveling in a spaceship at a speed of 0.56c away from Earth. You send a laser beam toward Earth traveling at velocity relative to you. What do observers on the Earth gauge for the speed of the laser beam?
Two point charges of magnitude 4.0 μC and -4.0 μC are situated along the x-axis at x1 = 2.0 m and x2 = -2.0 m, respectively
You have a convex lens of focal length 3cm and NA=0.6. Light diffracts from two pinholes separated by a distance d. What is the smallest d can resolve using green light and what is the diameter of the lens?
A ball dropped from a height of 4.00 m makes an elastic collision with the ground. Assuming no mechanical energy is lost due to air resistance, a) show that the ensuing motion is periodic, b) find the period of the motion.
The current through B is found to be 1.0 A. When the two resistors are connected in series to the 9.0 V battery, a voltmeter connected across resistor A measures a voltage of 2.0 V. Find the resistances A and B.
1 a coil made of 5 loops of wire with a radius of 10.0 cm rotates about its diameter in a uniform magnetic field of
Dan is gliding on his skateboard at 4.0m/s . He suddenly jumps backward off the skateboard, How fast is Dan going as his feet hit the ground
an electron accelerated from rest through a voltage of 490v enters a region of constant magnetic field. if the electron
You make a capacitor by cutting the 13 centimeter diameter bottoms out of two aluminum pie plates, separating them by 3.25 millimeter, Determine the capacitance of your capacitor
An accident involved a 2000 kg truck that hit astationary 1000kg car stopped at a red light. The driver of Truckapplied his brakes 15m before he crashed into the car. After collision, the vehicles did not lock.
A coin rests on the bottom of a beaker filled with an unknown liquid. A ray of light from the coin travels to the surface of the liquid and is refracted as it enters into the air. How fast is the light traveling in the liquid
A long cylindrical conductor is placed in an initially (i.e., before the cylinder is present)uniform electric field which is perpendicular to the axis of the cylinder. Find the electrical potential outside of the cylinder
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