Which one of the following situations does the object have no acceleration? An elevator in a tall skyscraper moves upward at a constant speed of 3 m/s. A ball at the end of a string is whirled in a horizontal circle at a constant speed. A ball is thrown upward from the surface of the earth, slows to a temporary stop at a height of 4 m, and begins to fall backward toward the ground. seeing a red traffic light ahead, the driver of a mini van steps on the break. As a result ,

Q: A small lead ball, attached to a 1.70-m rope, is being whirled in a circle that lies in the vertical…

A: Given that, Angular speed, ω=3 rev/s = 3×2π rad/s Height of the motion from the ground is h0 = 2.0 m…

Q: A boy throws a stone horizontally with an initial speed of 20 m/s from the edge of a cliff. A stop…

A: Initial velocity of projectile U = 20 m/s along horizontal Time of flight t = 5.0 s  We need the…

Q: A rock was thrown horizontally from a 146 m high cliff. It strikes the ground 97 m from the base of…

A: Given: height of cliff H =146 m distance from base of cliff X = 97 m direction of initial velocity…

Q: In a scene from a classic cartoon, a hungry coyote is chasing a roadrunner, as shown in the figure…

A: a)Write the second kinematic equation along the horizontal direction and substitute the…

Q: A physics book slides off a horizontal tabletop with a speed of 1.1 m/s. It strikes the floor in…

A:

Q: velocity of the spacecraft when the engines shut off? What is the angle from the positive x axis

A: Given: Initial velocity of space-vehicle is u=3308 m/s making an angle 42° with positive x-axis.…

Q: particle initially is moving at a velocity with Cartesian components (5.0 m/s, 4.0 m/s) and 5.6 s…

A: Given u̅ =( 5î +4 ĵ )  v̅ = 8 î   t = 5.6 s

Q: car drives around a circular track of diameter 156 m at a constant speed of 33.0 m/s. During the…

A:

Q: A baseball pitcher throws a ball horizontally at a speed of 33.0 m/s. A catcher is 19.0 m away from…

A:

Q: A speeder travelling at a constant velocity of 40 m/s passes by a police car that is initially at…

A: Given:  The  velocity of the speeder is v = 40 m/s  The police car is initially on the rest.  The…

Q: You are on the roof of a Physics Building, 23 m above the ground. Your physics professor, who is…

A: Given quantities: Height of the building (H) = 23 m height of the professor (h) = 1.88 m speed of…

Q: The “Screaming Swing” is a carnival ride that is -not surprisingly- a giant swing. It’s actually two…

A: Given Data: The speed is v=30 m/s The diameter is d= 50 m The radius of the circular motion of…

Q: You are on the roof of a Physics Building, 36 m above the ground. Your physics professor, who is…

A:

Q: A rock is thrown horizontally at a speed of 10.00 m/s from the top of a 50.0 m-high vertical cliff…

A: Given data: Horizontal speed u=10 m/s. Height of the cliff h=50 m. Range R=40 m. The horizontal…

Q: A simple pendulum (a mass swinging at the end of a string) wings back and forth in a circular arc.…

A: Since the mass travels in an arc of a circle, the radial acceleration is ar=v2R At the end point the…

Q: A rubber ball is attached to a paddle by a rubber band. The ball is initially moving away from the…

A: Initial Velocity of the ball V1 =  -5.5 m/s Final Velocity V2 = + 5.5 m/s  time of travel t = 0.35 s…

Q: A test car starts from rest on a horizontal circular track of 115-m radius and increases its speed…

A:

Q: You are on the roof of a Physics Building, 54 m above the ground. Your physics professor, who is 1.7…

A:

Q: You are on the roof of a Physics Building, 44 m above the ground. Your physics professor, who is…

A: Apply the second kinematic equation to determine the time to drop the egg on head.

Q: You throw a stone straight down into a water well.  The stone starts from a height of 1 meter above…

A:

Q: A car drives around a circular track of diameter 159 m at a constant speed of 33.1 m/s. During the…

A: Answer the following question is

Q: A car at a traffic signal starts from rest and makes a left turn in a circular trajectory of radius…

A: GivenInitail velocity Of car (u)=0Radius of circular Trajectory (r)=6 mSpeed (v) of car in 2 s (t)=9…

Q: While playing sock baseball in the living room, a child swings a pair of socks attached to the end…

A:

Q: While playing sock baseball in the living room, a child swings a pair of socks attached to the end…

A: Consider the speed of the socks be v, and the length of the string, that is the radius of the…

Q: At the lowest point in a vertical dive (radius = 0.45 km), an airplane has a speed of 200 km/h which…

A:

Q: A golfer hits a shot to a green that is elevated 2.2 m above the point where the ball was struck.…

A: Initial speed of ball (u) = 21m/s  Angle made by ball above horizontal = 41°  Height of green above…

Q: You walk in the direction of the unit vector (1, 0, 0) a distance of 24 m at a constant speed of 3.0…

A:

Q: A tricycle moving at a constant speed of 12.2 m/s approaches towards a jeep that is initially at…

A: Given: The constant speed of the tricycle is 12.2 m/s. The initial separation between vehicles is…

Q: You are on the roof of a Physics Building, 31 m above the ground. Your physics professor, who is…

A: Given Data : The speed of the professor is given as v=1.69 ms The height of the building is given as…

Q: While playing sock baseball in the living room, a child swings a pair of socks attached to the end…

A: The expression for the centripetal acceleration in a circular motion is: Substitute the known…

Q: An object’s position as a function of time is x(t) = 9 m + 1.5 m/s t– 3 m/s^2 t^2 a. Calculate the…

A: Given  x(t)=9 + 1.5t- 3t2 Now We find velocity and acceleration as a function of time…

Q: A car drives around a circular track of diameter 130 m at a constant speed of 49.5 m/s. During the…

A:

Q: Building, 20 m above the ground. Your physics professor, who is 1.7 m tall, is approaching the…

A:

Q: The acceleration due to gravity on the surface of a planet depends on the mass and size of the…

A:

Q: Falcons are excellent fliers that can reach very high speeds by diving nearly straight down. To pull…

A:

Q: There are competitions in which pilots fly small planes low over the ground and drop weights, trying…

A:

Q: You are on the roof of a Physics Building, 26 m above the ground. Your physics professor, who is…

A: Height of Physics building, H = 26 m Height of Professor, h = 1.79 m Velocity at which professor…

Q: You are on the roof of a Physics Building, 41 m above the ground. Your physics professor, who is…

A: Given : yo = 41 m y = 1.62 m vox = 1.85 m/s

Q: An object with a mass of 2,000 kg moves with a constant speed of 20 m/s on a circular track with a…

A:

Q: A sailor is stuck on a tropical island and emergency supplies are airlifted to her before the ship…

A: Given: Plane flying at an altitude of H = 200 ft or 60.96 m   m=ft3.2808 200 ft in meter is 60.96…

Q: You are on the roof of a Physics Building, 21 m above the ground. Your physics professor, who is…

A: Given, you are on the roof of a Physics Building, y = 21 m above the ground. Your physics professor,…

Projectile Motion