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If a typical pad is 5.0cm thick and compresses by 2.0cm during the impact of a fall, what acceleration (in m/s^2) does the hip undergo to reduce its speed to 1.3m/s ?
Determine the rotation rate, in revolutions per second, required to give the astronaut a centripetal acceleration of 18.9g.
If he shot a dart at an antelope at rest 50 m away, and the antelope instantly began to accelerate at a constant rate away from the dart, running out of range of the dart just in time: a) Find the m
If two equal charges are separated by a certain distance, the force of repulsion is F. Given F1, if each charge in F1 is doubled and the distance is cut in half, what is the new value of the force o
Identical +1.43 µC charges are fixed to adjacent corners of a square. What charge (magnitude and algebraic sign) should be fixed to one of the empty corners, so that the total electric potenti
A cylindrical aluminum pipe of length 1.57 m has an inner radius of 2.20 x 10-3 m and an outer radius of 2.80 x 10-3 m. The interior of the pipe is completely filled with copper. What is the resistanc
A microphone located at the opposite end of the rail detects two pulses of sound, one that travels through the air and longitudinal wave that travels through the rail. a) Which pulse reaches the mic
Two cars are moving. The first car has twice the mass of the second car but only half as much kinetic energy. When both cars increase their speed by 2.52 m/s, they then have the same kinetic energy.
Determine its flow speed through the needle, v2. Assume that the pressure in the needle remains at p2= 1.0 atm and that the syringe is held horizontal. The final speed of the water in the barrel is
Assume free fall with up as positive y-direction, and use g = 9.80 m/s2. Take the initial direction of motion of the snowball to be the positive x-direction. (a) How long does the projectile remain
Two parallel plate capacitors have circular plates. The magnitude of the charge on these plates is the same. However, the electric field between the plates of the first capacitor is 2.04 x 105 N/C,
The magnitude of the force on q1 due to q2 equals the magnitude of the force on q1 due to the electric field of the parallel plate capacitor. What is the distance r between the two charges?
The wire in a heating element of an electric stove burner has a 0.75-m effective length and a 2.0*10^-6 m cross-section area. The wire is made of iron.
What is the magnitude and direction of the force that must be exerted by you on her? (Model her as a point particle.)
A 0.47 kg object connected to a light spring with a force constant of 22.0 N/m oscillates on a frictionless horizontal surface. If the spring is compressed 4.0 cm and released from rest. Determine t
Four point charges have the same magnitude of 2.59 x 10-12 C and are fixed to the corners of a square that is 4.40 cm on a side. Three of the charges are positive and one is negative. Determine the
A model rocket is launched straight upward with an initial speed of 70.0 m/s. It accelerates with a constant upward acceleration of 1.00 m/s2 until its engines stop at an altitude of 120 m. (a) Wha
Suppose a charge of -2.10 µC is at the origin and a charge of 2.90 µC is at the point (0, 3.00) m. (a) Find the electric potential at (4.00, 0) m, assuming the electric potential is zero a
At t = 0, one toy car is set rolling on a straight track with initial position 16.0 cm, initial velocity -4.2 cm/s, and constant acceleration 2.20 cm/s2. At the same moment, another toy car is set
An electron is accelerated from rest through a potential difference 1200 V. Give the electron's kinetic energy after this acceleration in electron-volts and in joules.
In a women's 100-m race, accelerating uniformly, Laura takes 2.00 s and Healan 3.00 s to attain their maximum speeds, which they each maintain for the rest of the race. They cross the finish line s
When kicked, the ball leaves the ground with a speed of 20.0 m/s at an angle of 48.0° to the horizontal. How much does the ball clear or fall short of clearing the cross bar?
Margaret walks to the store using the following path: .500 miles west, .200 miles north, .300 miles east. what is her total displacement? that is, what s the length and direction of the vector that