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A motorist traveling at 13 m/s encounters a deer in the road 49 m ahead.
If the maximum acceleration the vehicle’s brakes are capable of is −6 m/s2, what is the maximum reaction time of the motorist that will allow her or him to avoid hitting the deer?
A ladder 7.09 m long leans against the side of a building. If the ladder is inclined at an angle of 79.50° to the horizontal, what is the horizontal distance from the bottom of the ladder to the building.
A grocery cart is pushed along an aisle by a shopper who exerts a constant horizontal force of . The acceleration of gravity is . If all frictional forces are neglected and the cart starts from rest, illustrate what is the grocery cart’s final s..
At what angle is the curve banked? The acceleration due to gravity is 9.8 m/s2.
The diameters of the main rotor and tail rotor of a single-engine helicopter are 7.53 m and 1.03 m, respectively. The respective rotational speeds are 449 rev/min and 4147 rev/min. Compute the speeds of the tips of both rotors.
What is the force exerted by the scale if the elevator is accelerating downward with an acceleration of 2.6 m/s2. If the elevator's descending speed is measured at 10 m/s at a given point, but its speed is decreasing by 2.6 m/s2, illustrate what is ..
A 145 g wire is held under a tension of 258 N with one end at x = 0 and the other at x = 13.0 m. At time t = 0, pulse 1 is sent along the wire from the end at x = 13.0 m. At time t = 30.9 ms, pulse 2 is sent along the wire from the end at x = 0. A..
A long string is wrapped around a 6.60 diameter cylinder, initially at rest, that is free to rotate on an axle. The string is then pulled with a constant acceleration of 1.70 until 1.30 of string has been unwound. If the string unwinds without slippi..
A steel cable with total length 20 m and mass 100 kg is connected to two poles. The tension in the cable is 2,000 N, and the wind makes the cable vibrate with a frequency of 2 Hz. compute the wavelength of the resulting wave on the cable.
You're driving down the highway late one night at 18 - {rm m}/{rm s} when a deer steps onto the road 45 -{rm m} in front of you. Your reaction time before stepping on the brakes is 0.50- {rm s}, and the maximum deceleration of your car is 11 {rm m..
A space station, in the form of a wheel 100m in diameter, rotates to supply an "artificial gravity" of 3.7m/s2 for persons who walk around on inner wall of the outer rim. Find out the rate of rotation of the wheel (in revolutions per minute) that ..
why is it advisable to make use of a proper restraining seat rather than hold a child on your lap.
A heavy piece of hanging sculpture is suspended by a 146.0 cm long, 8.03 gm wire. When the wind blows hard, wire hums at its fundamental frequency of 113.0 Hz. What is the mass of the sculpture (in kg) assume that the local acceleration due to gravit..
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