Two-dimensional motion
In two-dimensional motion, such as projectile motion, we can write the acceleration as: a=gj (this is vector j) This implies what about the velocity and displacement of the projectile?
In two-dimensional motion, such as projectile motion, we can write the acceleration as: a=gj (this is vector j) This implies what about the velocity and displacement of the projectile?
An airplane flies at 65 meters per second in a direction 149 degrees counterclockwise from east. What are the east and north components of the plane's velocity? The book's answer is: -200 m/s for its east velocity and 120 m/s for its north velocity. Can you confirm whether this is correct and show its solution? The book does
An airplane flies due west at 185 km/h with respect to the air. There is a wind blowing at 85 km/h to the northeast relative to the ground. What is the plane's speed with respect to the ground? The book's answer is 140 km/h. But it does not show how it arrived at that answer. Do you know?
See the attached document.
A particle of charge 6e enters a region containing a magnetic field with a velocity of 7.5 X 105 m/s that is perpendicular to the field. There is a force on the particle of 6.84 X 10-13 N. Find the magnetic field T.
A bicycle wheel consist of a rim ( radius R = 0. 40 m ) and essintially massless spokes. Soppose we mount the bycle wheel on the wall. so that the wheel is parallel to the wall. Is it free to spin around its center, but not freee to translate. A very light string is wrapped around the rim and a mass m + 0. 80 kg is attached to t
The frequency of a steam train whistle as it approaches you is 538Hz. After it passes you, its frequency is measured as 509 Hz., how fast the train moving (assume constant velocity)? Assume the speed of sound is 343m/s.
1. If a car goes around a curve at half the speed, the centripetal force on the car is... a.) twice as big. b.) four times as big. c.) half as big. d.) one-fourth as big. 2. What is the gravitational force between two trucks, each with a mass of 2.0 x 10^4 kg, that are 2.0 m apart? 3. The gravitational
An essentially massless spring is connected to the ceiling. A 5.00 g mass is attached to the spring so that the spring is 2.00 cm longer than its unstretched length. The mass is the pulled downward so that it is 20 cm below the equilibriun position and released from rest. After 10s the amplitude of oscillation has been reduce to
A 243 N sphere 0.199 m in radius rolls, without slipping, 6.06 m down a ramp that is inclined at 36.9° with the horizontal. What is the angular speed of the sphere at the bottom of the hill if it starts from rest?
An 82kg man drops from rest on a diving board 3.0 m above the surface of the water and comes to rest 0.55 s after reaching the water. What force does he water exert on him?
A 243 N sphere 0.199 m in radius rolls, without slipping, 6.06 m down a ramp that is inclined at 36.9° with the horizontal. What is the angular speed of the sphere at the bottom of the hill if it starts from rest?
Physics questions The expression given below represents a transverse harmonic wave travelling along a string which is stretched along the horizontal x-axis. The expression yields the transverse wave displacement y in metres when x is entered in metres and the time t in seconds. For 1 mark each, answer the following q
See attached file. Noninertial reference systems Latitude and angular velocity of a bullet fired straight up
A dare devil decide to jump a canyon. Its walls are equally high and 10m apart. He takes off by driving a motor cycle up a short ramp sloped at an angle of 15 degrees. What minimum speed must he have in order to clear the canyon.
A 2.00 x 10^3 kg car rounds a circular turn of a radius 20.0 m. If the road is flat and the coefficient of static friction between the tires and the road is 0.70, how fast can the car go without skidding?
See attached file.
Cliff divers at Acapulco jump into the sea from a cliff 36m high At the level of the sea a rock sticks out a horizontal distance at 6m. With what minimum horizontal velocity must the cliff divers leave the top of the cliff if they are to miss the rock?
Hi. Can someone please show me how to do the following problem: "An 11.2 g object moving to the right at 21.3 cm/s makes an elastic head-on collision with a 17.3 g object moving in the opposite direction at 31.5 cm/s. What is the velocity of the 11.2 g object after the collision? (positive is to the right)" Thank you!
See ATTACHMENT #1 for a diagram. A Chevrolet whose weight Wc= 2700 lb is moving at Vc = 40 mi/hr at 0 degrees. A Bronco whose weight Wb= 3600 lb is moving at Vb = 60 mi/hr at 270 degrees. The vehicles crash and lock together then move as a unit. a. On the diagram, (not to scale) show all the given data. b. Showing u
1. At t=0, a fly wheel has an angular velocity of 4.7 rad/s (radians per second), an angular acceleration of -0.25 rad/s^2 , and a reference line at pheta0 = 0. (a) Through what maximum angle phetamax will the reference line turn in the positive direction ? At what times t will the reference line be at (b) pheta = 1/2phetamax an
A 2 kg block slides along a friction-less tabletop at 8.0 m/s toward a second block (at rest) of 5 kg. A spring which obeys Hooke's law with a spring constant k = 850 N/m, is attached to the second block. (a) What will be the maximum compression of the spring? (b) What will be the velocities of the two blocks when the sprin
A spring of negligible mass stretches 3.00 cm from its relaxed length when a force of 6.20 N is applied. A 1.200 kg particle rests on a friction-less horizontal surface and is attached to the free end of the spring. The particle is pulled horizontally so that it stretches the spring 5.00 cm and is then released from rest at t=0.
"The launching mechanism of a toy gun consists of a spring of unknown spring constant. If the spring is compressed a distance of 0.139 m and the gun is fired vertically, the gun can launch a 25.1g projectile from rest to a maximum height of 24.5 m above the starting point of the projectile. Neglecting all resistive forces, deter
See attached files. 1. An object of mass 2.00kg moves on the x-axis subject to exactly two forces: a Hooke's law force with spring constant 8.00N/m, and a friction force proportional to velocity with drag coefficient 4.00 Ns/m.
See attached graph. A solid door of mass M = 20kg and width l= 1m is hit at a right angle by a mud ball of mass m = .5kg, which hits the door at the edge with speed v= 10m/s and sticks. (a) What is the rotational inertia of the door about the hinges? (b) What is the angular velocity of the door after having been struck?
Refer to attachment for 9 Physics problems.
A 25kg ball is thrown 18m up in the air. What is it's initial velocity?
Determine trigonometrically the magnitude and direction of the velocity of a plane that is flying west at 100.0km/h with respect to the air while the wind is blowing toward the north at 65.0 km/h relative to he ground.
Q. a 4kg object resting on a pole 8m tall is struck by a 20 gram bullet, which is moving horizontally at 200 m/sec. the bullet remains embedded in the object. a. What horizontal velocity does the object acquire? b. How far from the base of the pole does the object strike the ground?