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A set of crash tests consists of running a test van moving at a speed of 10.8 m/s (23.76 m/h) into a solid wall. Strapped securely in an advanced seat belt system, a 55 kilogram (121 lbs) dummy is found to move a distance of 0.63 meter from the moment the cartouches the wall to the time the van is stopped. Find the size of the average force which acts on the dummy during that time?
a racquet ball with mass m 0.252 kg is moving toward the wall at v 18.1 ms and at an angle of 25deg with respect to
two trains are traveling toward each other in still air at 26.0 ms relative to the ground. one train is blowing a
A 0.20 kg block on a vertical spring with a spring constant of 5 multiplied by 103 N/m is pushed downward, compressing the spring 0.090 m. When free, the block leaves the spring and travels upward vertically. How high does it rise above point of r..
water is moving with a speed of 2.3 ms through a perfectly sealed long pipe with a cross sectional area of 5 cm2. the
A dolphin jumps with an initial velocity of 12.5 m/s at an angle of 36.0° above the horizontal. how high above the water is the center of the hoop
In coming to a stop, a car leaves skid marks 92m lng on thehighway. Assuming a deceleration of 7.00 m/s^2 estimate the speed of the car just before braking
The mass of a neutron is about 1.7x10?27 kg. Suppose the mass of a neutron star is about 3.4*10^30 kg. How many neutrons does such a star contain
The length of a simple pendulum is 0.75 m and the mass of the particle (the "bob") at the end of the cable is0.40 kg. What is the angular frequency of the motion
A test is fired stright up from rest with a net acceleration of20m/s2. after 4 seconds the motor turns off, but the rocket continues to coast upward. what maximum elevation does the rocketreach?
Spider silk has a Young's modulus of 4.0x10^9 N/m^2 and can withstand stresses up to 1.4x10^9 N/m^2. what angle does the web make with the horizontal
A 70 kg man steps out a window and falls (from rest) 1.2 m to a sidewalk. What is his speed just before his feet strike the pavement
A plot of pressure as a function of volume is known as a pV diagram. pV diagrams are often used in analyzing thermodynamic processes. Consider an ideal gas that starts in state O, as indicated in the diagram. Your task is to explain how the gas proce..
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