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After a tornado, a 0.50 straw was found embedded 3.0 into the trunk of a tree.If the average force exerted on the straw by the tree was 85 , what was the speed of the straw when it hit the tree?
At the end of the firing period, the craft has velocity components of vx = 3565 m/s and vy = 4556 m/s. Find the magnitude and direction of the initial velocity. Express the direction as an angle wit
An ocean liner leaves New York City and travels 41.0° north of east for 245 km. How far east and how far north has it gone? In other words, what are the magnitudes of the components of the ship
Bonnie and Clyde are sliding a 311 bank safe across the floor to their getaway car. The safe slides with a constant speed if Clyde pushes from behind with 369 of force while Bonnie pulls forward on
A plane slows down from 142m/s to 1m/s in 3200m. A. What is the acceleration of the plane?
In a nuclear experiment a proton with kinetic energy 0.85 MeV moves in a circular path in a uniform magnetic field. What energy (in MeV) must (a) an alpha particle (q = +2e, m = 4.0 u) and (b) a deu
At time 0 a grinding wheel has an angular velocity of 30. It has a constant angular acceleration of 35 until a circuit breaker trips at time = 2.10. From then on, the wheel turns through an angle o
A motorist traveling at 12 m/s encounters a deer in the road 38 m ahead. If the maximum acceleration the vehicle's brakes are capable of is -7 m/s2, what is the maximum reaction time of the motoris
What is the terminal speed for an 79.0 skier going down a 36.0 snow-covered slope on wooden skis = 0.060? Assume that the skier is 1.80 m tall and 0.500 m wide.
A curve in a highway has radius of curvature 130 m and is banked at 3.5°. On a day when the road is icy, what is the safest speed to go around the curve?
A car drives north at 46 mi/h for 10 {rm min} and then turns east and goes 5.0 {rm mi} at 56 mi/h. Finally, it goes southwest at 30 mi/h for 6.0 {rm min} Determine the car's displacement.
The mass of a robot is 5740 kg. This robot weighs 3720 N more on planet A than it does on planet B. Both planets have the same radius of 1.33 multiplied by 107 m. What is the difference MA - MB in t
Find the minimum energy required to move the nucleus from the equilibrium position to infinity for this model for hydrogen with charge 1.062e-19 C and radius 0.36 nm.
According to the laws of classical (Newtonian) physics, what is the speed (in km/s) of the bowling balls with respect to you?
A truck travels beneath an airplane that is moving 170 km/h at an angle of 51 to the ground. How fast must the truck travel to stay beneath the airplane?
A river has a steady speed of 0.500 m/s.A student swims upstream a distane of 1.00 km and swims back to the starting point. If the student can swim at a speed of 1.20 m/s in still water, how long d
The charge is uniformly distributed within the volume of each sphere. What is the magnitude E of the electric field midway between the spheres?
A space station, in the form of a wheel 194 m in diameter, rotates to provide an "artificial gravity" of 7.4 m/s2 for persons who walk around on the outer rim. Find the rotational frequency of the
An electronic device requires a power of 16 W when connected to a 15.0 V battery. How much power is delivered to the device if it is connected to a 11.0 V battery? (Neglect the resistances of the b
A force of 12.7 N acts horizontally on a 21.7-kg mass that is at rest on a smooth table. Find acceleration
A woman of mass m =82 kg rides in a elevator of mass M = 4078 kg. The elevator is pulled by a cable, and the woman is standing on a scale (of negligible mass).
What is the magnitude of the electric field at P1? Hint: The direction of the dipole vector ˆp is from the negative charge to the positive charge. Answer in units of N/C.
A circular loop in the plane of the screen lies in a 0.87 T magnetic field pointing into the screen. If the loop's diameter changes from 19.5 cm to 6.0 cm in 0.50 s, determine the following.
A plane leaves the airport in Galisto and flies 175 km at 68.0^circ east of north and then changes direction to fly 260 km at 48.0^circ south of east, after which it makes an immediate emergency la
Alex pulls with force of magnitude 206 N, and Charles pulls with force of magnitude 163 N. Note that the direction of Charles' force is not given. What is the magnitude of Betty's force?