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A 45.0 g Super Ball traveling at 30.0 m/s bounces off a brick wall and rebounds at 16.0 m/s. A high-speed camera records this event. If the ball is in contact with the wall for 4.50 ms, what is the
We want to launch the package in such a way that it will never come back, and when it is very far from the asteroid it will be traveling with speed 225 m/s. We have a large and powerful spring whose
A 50.0 g Super Ball traveling at 27.0 m/s bounces off a brick wall and rebounds at 21.0 m/s. A high-speed camera records this event. If the ball is in contact with the wall for 3.50 ms, what is the
A 1250 W radiant heater is constructed to operate at 115 V. (a) What is the current in the heater when the unit is operating? (b) What is the resistance of the heating coil? (c) How much thermal en
Find the moment of inertia about each of the following axes for a rod that is 0.300 in diameter and 1.60 long, with a mass of 5.00×10-2 .
A rowboat crosses a river with a velocity of 3.46 mi/h at an angle 62.5° north of west relative to the water. The river is 0.685 mi wide and carries an eastward current of 1.25 mi/h. How far ups
We want to launch the package in such a way that it will never come back, and when it is very far from the asteroid it will be traveling with speed 218 m/s. We have a large and powerful spring whose
A car crashes into a wall at 60 m/s and is brought to rest in 0.1 s. Calculate the average force exerted on a 80 kg test dummy by the seat belt.
There is a region of magnetic field. from a centre point from it there are 2 semi infinite wire making some angle the region is having rdius r. what will be the magnetic field intensity at that cent
A rifle is aimed horizontally at a target 51.0m away. The bullet hits the target 2.50cm below the aim point. a) What was the bullets flight time? b) What was the bullets speed as it left the barrel?
A 350 N child is in a swing attached to ropes 1.75m. Find the gravitational PE associated with the child relative to her lowest position when the ropes make a 30 degree angle with the vertical.
Two packing crates of masses m1 = 10.0 kg and m2 = 4.50 kg are connected by a light string that passes over a frictionless pulley as in the figure below. The 4.50 kg crate lies on a smooth incline o
However, after the crate is in motion, a horizontal force of 59 N is required to keep it moving with a constant speed. Find the coefficients of static and kinetic friction between crate and floor.
A space station, in the form of a wheel 127 m in diameter, rotates to provide an "artificial gravity" of 4.00 m/s2 for persons who walk around on the inner wall of the outer rim. Find the rate of th
A 9000 kg railroad car is moving at 3m/s strikes a stationary (not moving) 5000 kg railroad car. if the two rail road cars couple and move off together after the collision, what is their velocity?
A stone is thrown with an initial speed of 10.6 m/s at an angle of 52 degrees above the horizontal from the top of a 30 m building. If air resistance is negligible, then what is the magnitude of the
In addition, the snow exerts a retarding force on the sled that points opposite to the direction of motion, and has a magnitude of 57. Find the acceleration of the sled and child.
The male figure is 180 cm tall, the female 168 cm. Normalize the displacements of each figure to a common height of 200 cm, and re-form the vector sums as in part (a). Then find the vector differen
A 214-kg log is pulled up a ramp by means of a rope that is parallel to the surface of the ramp. The ramp is inclined at 31.0° with respect to the horizontal. The coefficient of kinetic frictio
The resultant displacement A+B has a magnitude of 3.75 km. What is the magnitude of B, and what is the direction of A+B relative to due south?
A tennis player places a 56 kg ball machine on a frictionless surface. the machine fires a 0.055 kg tennis ball horizontally with a velocity of 43 m/s toward north. what is the final velocity of the
How many 101 W lightbulbs can you use in a 120 V circuit without tripping a 13 A circuit breaker? (The bulbs are connected in parallel, which means that the potential difference across each lightbul
Two stationary positive point charges, charge 1 of magnitude 4.00 nC and charge 2 of magnitude 1.80 nC , are separated by a distance of 44.0 cm. An electron is released from rest at the point midway
What is the electric potential at this point? Express your answer to two significant figures and include the appropriate units.
A 6500-kg helicopter accelerates upward at 0.60m/s^2 while lifting a 1200-kg car. (a) What is the lift force exerted by the air on hte rotors? (b) What is the tension in the cable (ignore its mass)