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1. A constant force is applied to an object over time interval t. As t increases, the magnitude of the impulse _____.
increasesdecreasesremains the same2. A system is composed of ball 1 of mass m1 and ball 2 of mass m2. Each ball is traveling at speed v, but in the opposite direction from the other ball. The total momentum of the system is m1v in the direction of ball 2. Which equation describes the relationship between m1 and m2?m2 = m12m2 = 0.5m1m2 = 2m1m2 =9m13. A system consists of three billiard balls. Each ball has mass m and is traveling at speed v. One ball is traveling north, another ball is traveling east, and the third ball is traveling south. What is the momentum of the system?
mv, heading westmv, heading eastSquare Root 2 mv, heading east3mv, heading east4. A 0.24-kg blob of clay strikes a wall with an initial velocity of 25m/s. The clay comes to a stop against the wall in 91ms What is the average impact force on the clay?
66 N41 N80 N55 N
5. A block of mass m = 4.4 kg slides from left to right across a frictionless surface with a speed Vi=8.4m/s. It collides in a perfectly elastic collision with a block of mass M that is at rest. After the collision, the 4.4-kg block reverses direction, and its new speed is Vf=2.5 m/s What is M?
6.8 kg7.4 kg8.8 kg8.1 kg
a 75 g bungee cord has an equilibrium length of 1.2 m. the cord is stretched to a length of 1.8 m then vibrated at 20
a potters wheel is rotating at 3.2 rads in a counterclockwise direction when the potter turns it off and lets it slow
a flat surface having an area of 3.2 m2 is rotated in a uniform electric field of magnitude e 6.2 x 105 nc.determine
what fraction of the power radiated by the sun is intercepted by the planet uranus? the radius of mercury is 2.56
90 kW of power is delivered to the other side of a city by apair of power lines with the voltage difference of 13942.8 V. What is the voltage change along each line
Consider a Resistor and inductor circuit connected to a generator, Vmax is given, frequency is given, L is given R is given. Find the power
A river narrows at rapids from a width of 15 meter to a width of only 6 meter. Obtain the speed of water flowing in the rapids
A bear standing on the side of a very still and clear pond is about to take a swipe at a bass just off the bank. how far beneath the water does he believe the fish to be
A man enters a tall tower, needing to know its height. If this pendulum is taken to the Moon, where the free-fall acceleration is 1.67 m/s2, determine what is the period there
Solar energy is incident on the pond at an average rate of 400 . If the water absorbs all the solar energy and does not exchange energy with its surroundings, explain how many hours will it take to warm from 15 to 25 ?
In a physics lab, light with a wavelength of 570nmtravels in air from a laser to a photocell in a time of 17.0ns. What is the wavelength of the light in the glass
Diagnostic ultrasound of frequency 7.00 MHz is used to examine tumors in soft tissue. Obtain the wavelength in air of such a sound wave
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