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After falling from rest at a height of 31 m, a 0.48 kg ball rebounds upward, reaching a height of 21 m. If the contact between ball and ground lasted 1.8 ms, what average force was exerted on the b
A car is driven 115 km west and then 80 km southwest. What is the displacement of the car from the point of origin (magnitude and direction)?
A car of mass 973 kg coasts on a level road, starting with an initial speed of 13.8 m/s and coming to rest 14.7 s later. Find the frictional force acting on the car.
"A wooden block weighing 7 N is at rest on top of a wooden desk. The coefficient of static friction between the block and the desk is 0.41. Find the minimum horizontal force required to move the blo
Calculate (a) the maximum value of its speed and acceleration, (b) the speed and acceleration when the mass is 6.0 cm from the equilibrium position.
Find (a) the number of revolutions the tire makes during the motion, assuming that no slipping occurs. (b) What is the final angular speed of a tire in revolutions per second?
You're driving down the highway late one night at 19 m per s when a deer steps onto the road 43 m in front of you. Your reaction time before stepping on the brakes is 0.50 s , and the maximum decele
How long does the wheel take to reach its final operating speed of 1200 rev/min? Through how many revolutions does it turn while accelerating?
It's a snowy day and you're pulling a friend along a level road on a sled. You've both been taking physics, so she asks what you think the coefficient of friction between the sled and the snow is. Y
Calculate the force of Earth's gravity on a spacecraft 2.00 Earth radii above the earth's surface if its mass is 1480kg
Determine the translational kinetic energy of its center of mass, (b) the rotational kinetic energy about its center of mass, and (c) its total energy.
A shopper pushes a cart 39 m south down one aisle and then turns 90.0° west and moves 27 m. He then makes another 90.0° turn and moves 14 m. What is the largest displacement?
A chair of weight 130 lies atop a horizontal floor; the floor is not frictionless. You push on the chair with a force of = 45.0 directed at an angle of 39.0below the horizontal and the chair slides
The string on a string bass vibrates at a fundamental frequency of 78.0 Hz. If the string's tension were increased by a factor of 4, what would be the new fundamental frequency in Hz?
The car makes it one quarter of the way around the circle before it skids off the track. Determine the coefficient of static friction between the car and track from these data.
Suppose there are 1.2×10^4 civilizations broadcasting radio signals in the Milky Way Galaxy right now. On average, how many stars would we have to search before we would expect to hear a sign
Determine the tension in the string, the acceleration of the object, and the speed with which the object hits the floor. Verify last answer by using principle of conservation of energy to find speed
An Automobile engine slows down from 4500rpm to 1200rpm in 2.5 s. Calculate (a) its angular acceleration, assumed constant, and (b) the total number of revolutions the engine makes in this time.
If the western shoreline is horizontally 300 m from the peak, what are the distances from the western shore at which a ship can be safe from the bombardment of the enemy ship?
An electron accelerated from rest through a voltage of 500 V enters a region of constant magnetic field. If the electron follows a circular path with a radius of 17 cm, what is the magnitude of the
A 5.00-g lead bullet traveling at 330 m/s is stopped by a large tree. If half the kinetic energy of the bullet is transformed into internal energy and remains with the bullet while the other half i
The foot of the ladder is 8.0 m from the bottom of the wall. Calculate the force exerted by the wall, and the normal force exerted by the floor on the ladder. (480 N, 1200 N)
Monochromatic light of variable wavelength is incident normally on a thin sheet of plastic film in air. The reflected light is a maximum only for 482.9 and 676.0 in the visible spectrum. What is th
A 1000 {kg} steel beam is supported by the two ropes shown in the figure. Each rope can support a maximum sustained tension of 5600 {N}.
A pair of eyeglass frames are made of epoxy plastic (coefficient of linear expansion 1.30 104 C1). At room temperature (20.0C), the frames have circular lens holes 2.20 cm in radius. To what