# A 13 kg block is at rest on a level floor.

Get college assignment help at uniessay writers A 13 kg block is at rest on a level floor. A 405 g glob of putty is thrown at the block such that it travels horizontally, hits the block, and sticks to it. The block and putty slide 15 cm along the floor. If the coefficient of sliding friction is 0.40, what is the initial speed of the putty?

## Waves moving on a lake have a speed of 2 m/s

Waves moving on a lake have a speed of 2 m/s and a distance of 1.5 m between adjacent crests. a. What is the frequency of the waves? b. What is the period of the waves?

## A 1.5 {rm kg} block is connected by a rope across

A 1.5 {rm kg} block is connected by a rope across a 50 {rm cm}-diameter, 2.0 {rm kg}, frictionless pulley, as shown in the figure. A constant 10 {rm N} tension is applied to the other end of the rope.

## A small, 100g cart is moving at 1.2 m/s on an

A small, 100g cart is moving at 1.2 m/s on an air track when it collides with a larger, 1.00kg cart at rest. After the collision, the small cart recoils at .850 m/s. what is the speed of the large cart after the collision?

## Block 1, of mass m_1, is connected over an ideal (massless

Block 1, of mass m_1, is connected over an ideal (massless and frictionless) pulley to block 2, of mass m_2, as shown. Assume that the blocks accelerate as shown with an acceleration of magnitude a and that the coefficient of kinetic friction between block 2 and the plane is mu.

## A driver wearing a seatbelt decelerates at roughly the same rate

A driver wearing a seatbelt decelerates at roughly the same rate as the car itself. Since modern cars have a “crumple zone” built into the front of the car, the car will decelerate over a distance of roughly 1.2 m. Find the net force acting on a 71-{rm kg} driver who is decelerated from 22 m/s to rest in a distance of 1.2 m.

3 = 1 a(1)

## A 387 g object is attached to a spring and executes

A 387 g object is attached to a spring and executes simple harmonic motion with a period of 0.270 s. If the total energy of the system is 6.25 J. (a) Find the maximum speed of the object.

## An object is placed 18 cm from a first converging lens

An object is placed 18 cm from a first converging lens of focal length 11.2 cm. A second converging lens with focal length 38 cm is placed 10 cm to the right of the first converging lens. (Take the direction to the right to be positive.) (a) Find the position q1 of the image formed by the first converging lens. 1 cm (b) How far from the second lens is the image of the first lens? 2 cm (c) What is the value of p2, the object position for the second lens? 3cm (d) Find the position q2 of the image formed by the second lens. 4 (e) Calculate the magnification of the first lens. M1 = 5 (f) Calculate the magnification of the second lens. M2 = 6 (g) What is the total magnification for the system? Mtotal = 7 (h) Is the final image real or virtual? Is it upright or inverted? 8

## A 4.0 kg bucket of water is raised from a well

A 4.0 kg bucket of water is raised from a well by a rope. If the upward acceleration of the bucket is 4.5 m/s2, find the force exerted by the rope on the bucket of water.

## if a ski lift raises 100 passengers averaging 644 N in

Get college assignment help at uniessay writers if a ski lift raises 100 passengers averaging 644 N in weight to a height of 130 m in 60 s, at constant speed, what average power is required of the force making the lift?

## In Figure 7-48, a cord runs around two massless, frictionless pulleys.

In Figure 7-48, a cord runs around two massless, frictionless pulleys. A canister with mass m = 15 kg hangs from one pulley, and you exert a force F on the free end of the cord. Fig. 7-48 (a) What must be the magnitude of F if you are to lift the canister at a constant speed? N (b) To lift the canister by 1.9 cm, how far must you pull the free end of the cord? cm (c) During that lift, what is the work done on the canister by your force (via the cord)? J (d) What is the work done on the canister by the gravitational force on the canister? J

## A 5050.0-kg truck moving east at 5.76 m/s collides with a

A 5050.0-kg truck moving east at 5.76 m/s collides with a 995.0-kg car moving west at 50.1 m/s. The collision takes place over a time interval of 0.294 s. The car and the truck stick together after the collision. Find the force (in N) of the car on the truck during the collision. Call this force positive if it points to the east, and negative if it points to the west.

## A light rope is wrapped several times around a large wheel

A light rope is wrapped several times around a large wheel with a radius of 0.400 m. The wheel rotates in frictionless bearings about a stationary horizontal axis, as shown in the figure . The free end of the rope is tied to a suitcase with a mass of 15.0 kg. The suitcase is released from rest at a height of 4.00 m above the ground. The suitcase has a speed of 3.50 m/s when it reaches the ground. Calculate the angular velocity of the wheel when the suitcase reaches the ground. Calculate the moment of inertia of the wheel.

## Two bicycle tires are set rolling with the same initial speed

Two bicycle tires are set rolling with the same initial speed of 3.80 m/s along a long, straight road, and the distance each travels before its speed is reduced by half is measured. One tire is inflated to a pressure of 40 {rm psi} and goes a distance of 17.4 m; the other is at 105 {rm psi} and goes a distance of 94.0 m. Assume that the net horizontal force is due to rolling friction only and take the free-fall acceleration to be g = 9.80 m/s^2. What is the coefficient of friction for the tire under low pressure?

## Textbook question for physic I – A water storage tank is

Textbook question for physic I – A water storage tank is 4.00 meters tall and it is 90.0 % full of water. The top of the tank is sealed with a lid with the trapped air being at atmospheric pressure. A small hole is put in the side of the tank at a point 2.00 meters from the bottom. a) how much will the water level inside the tank drop B) and if the 2nd hole is now put in the side of the tank at a point 1.00 meter above the bottom what will happen?

## A disk, initially rotating at 114 rad/s, is slowed down with

A disk, initially rotating at 114 rad/s, is slowed down with a constant angular acceleration of magnitude 2.53 rad/s2. (a) How much time does the disk take to stop? (b) Through what angle (rad) does the disk rotate during that time?

## 1.the lower atmosphere is directly warmed: A. from the weight of

1.the lower atmosphere is directly warmed: A. from the weight of the atmosphere above B. by incoming solar radiation c. by the absorption of terrestrial radiation D. by the emission of terrestrial radiation 2. The greenhouse effect gets its name from florist’s greenhouse, where glass prevents reradiated solar energy from escaping. Glass is transparent to visible waves, and opaque to ultraviolet and infrared. glass acts as a sort of one-way valve, allowing ____ from leaving. A. infrared light to enter, and preventing short waves B. ultraviolet light to enter, and preventing longer waves C. visible light to enter, and preventing longer waves D. infrared light to enter, and preventing visible light

## A 110.0 cm wire carries a current of 1.60 A. The

A 110.0 cm wire carries a current of 1.60 A. The wire is formed into a circular coil and placed in a Magnetic Field of intensity 0.10 T. Find the maximum torque that can act on the loop.

## Suppose that a gangster sprays Superman’s chest with 9 g bullets

Suppose that a gangster sprays Superman’s chest with 9 g bullets at the rate of 105 bullets/min, the speed of each bullet being 400 m/s. Suppose too that the bullets rebound straight back with no change in speed. What is the magnitude of the average force on Superman’s chest from the stream of bullets? _____N Please show me step by step

## An ordinary flea has a mass of 205 . How many

An ordinary flea has a mass of 205 . How many newtons does it weigh?

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