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1. You are a civil engineer and one thing that you needed to ensure is the quality and the necessary materials for a project. Explain interms of impulse how padding reduces forces in a collision. State this interms of a real example, such as the advantages of a carpeted vs. tile floor for a day care center.
Since astronauts in orbit are apparently weightien, a clever method of measuring their masses is needed to monitor their man gains or losses to adjust diets. One way to do this is to exert a known force on an astronauts and measure the acceleration produced. Suppose a net external force of 50.0 N is exerted and the astronaut's acceleration measured to be 0.893 m/s², (a) calculate her mass: (b) by exerting a force on the astronaut, the vehicle in which they orbit experiences an equal and opposite force. Discuss how this would affect the measurement of the astronaut's acceleration. Proposed a method in which recoil of the vehicle is avoided.
1. Since astronauts in orbit are apparently weightien, a clever method of measuring their masses is needed to monitor their man gains or losses to adjust diets. One way to do this is to exert a known force on an astronauts and measure the acceleration produced. Suppose a net external force of 50.0 N is exerted and the astronaut's acceleration measured to be 0.893 m/s², (a) calculate her mass: (b) by exerting a force on the astronaut, the vehicle in which they orbit experiences an equal and opposite force. Discuss how this would affect the measurement of the astronaut's acceleration. Proposed a method in which recoil of the vehicle is avoided.
How does Earth’s density compare to the densities of other planets?
The ball is initially at 2ȋ + 0ĵ + 3k̂ then it moved to 4ȋ + 0ĵ + 5k̂ , its total displacement is 6ȋ + 0ĵ + 8k̂ .
A box is being pushed in two opposite directions. The force applied by the person pushing it to the left is 10 N, while it is being pushed 20 N to the right, The box moved to the left and vector sum of the applied forces is 30 N to the right
1. An archer shoots an arrow from a bow. Assuming the force exerted by the bow on the arrow is a spring force,
in one dimension
(a) write an expression of the force exerted on the arrow.
(b) solve the equation in (a) and determine the velocity with which the arrow leaves the bow.
(c) In three dimension write the expression of the force exerted by the bow on the arrow.
A pulley is mounted on a frictionless axis and then the pulley is attached to the higher end of the inclined surface as shown in the figure. A massless cord is wrapped around the pulley while its other end is tied to a 1.0 kg object. The pulley has a radius of 20 cm and moment of inertia of 0.4 kg m2. The angle of the surface is 37° and the coefficient of kinetic friction is 0.2. The object is released from rest. The pulley starts to rotate as the object moves and the cord unwinds. Determine the acceleration of the object and the tension in the cord.
