Question

In: Physics

1.1 While a car travels around a circular track at a constant speed its, which of...

1.1 While a car travels around a circular track at a constant speed its, which of the following is true?

A) it has non-zero acceleration

B) it has zero acceleration

C) it has zero velocity, because the speed is constant

D) It has zero inertia

1.2. How many of the following statements are impossible?

(a) An object that has zero velocity and a non-zero acceleration.

(b) An object that travels with a constant velocity and a varying acceleration.

(c) An object that travels with a constant acceleration and a varying velocity.

1.3. For a freely falling object, how many of the following statements are true?

(a) the distance fallen during each second keeps increasing;

(b) the speed keeps increasing;

(c) the change in speed during each second keeps increasing;

(d) the acceleration keeps increasing.

Solutions

Expert Solution


Related Solutions

1a. A car drives around a circular track of diameter 154 m at a constant speed...
1a. A car drives around a circular track of diameter 154 m at a constant speed of 45.1 m/s. During the time it takes the car to travel 97 degrees around, what is the magnitude of the car s average acceleration? b. A car starts from rest, then accelerates at a constant rate over a distance of 63 m. It then immediately decelerates at a constant rate over a distance of 122 m. The entire trip lasts a total duration...
A runner sprints around a circular track of radius 130 m at a constant speed of...
A runner sprints around a circular track of radius 130 m at a constant speed of 7 m/s. The runner's friend is standing at a distance 260 m from the center of the track. How fast is the distance between the friends changing when the distance between them is 260 m? (Round your answer to two decimal places.) m/s
Marla is running clockwise around a circular track. She runs at a constant speed of 2...
Marla is running clockwise around a circular track. She runs at a constant speed of 2 meters per second. She takes 46 seconds to complete one lap of the track. From her starting point, it takes her 12 seconds to reach the northernmost point of the track. Impose a coordinate system with units in meters, the center of the track at the origin, and the northernmost point on the positive y-axis. (Round your answers to two decimal places.) (a) Give...
4. A car of mass m is traveling with constant speed v around a circular banked...
4. A car of mass m is traveling with constant speed v around a circular banked road of radius R, see the side view and the free-body diagram. a) Apply Newton’s 2nd law to the car, i.e. write equations for the centripetal, angular, and vertical components of the net force. b) Determine the angle θ at which the road should be banked so that no static friction is required to drive the car. Now, include the static friction force FS...
1)A 75 kg cyclist races around a circular track at a constant speed of 20 m/s....
1)A 75 kg cyclist races around a circular track at a constant speed of 20 m/s. The radius of the track is 50 m. Express both of your answers to the nearest whole number. a) What is the acceleration of the cyclist? b) What is the net force acting on the cyclist? 2)In the Bohr model of the hydrogen atom, an electron circles a proton in an orbit whose radius is 5.30 x 10-11 m. a) Find the magnitude of...
A ball travels around a circular track with a circumference of 0.850m every 2.50s. What is...
A ball travels around a circular track with a circumference of 0.850m every 2.50s. What is the tangential velocity of the ball? 0.340m/s 3.35m/s 2.94m/s 1.65m/s A little girl sits on a merry-go-round horse. The radius of the horse's path is 10.0m and it is spinning at 3.00m/s. The net centripetal force on the girl is 13.5N. What is the girl's mass? 45.0kg 109kg 15.0kg 12.2kg
A car traveling with constant speed travels 150 km in 7200 s. What is the speed of the car?
A car traveling with constant speed travels 150 km in 7200 s. What is the speed of the car? Express the speed with the appropriate units.
Alice is driving a race car around an essentially circular track.  Brian, who is sitting at a...
Alice is driving a race car around an essentially circular track.  Brian, who is sitting at a fixed position at the edge of the track, measures the time that Alice takes to complete a lap by starting his watch when Alice passes by his position (call this event E) and stopping it when Alice passes his positin again (call this event F).  This situation is also observed by Cara and Dave, who are passengers in a train that passes very close to...
A) A car travels at a constant speed of 32.5 mi/h (14.5 m/s) on a level...
A) A car travels at a constant speed of 32.5 mi/h (14.5 m/s) on a level circular turn of radius 49.0 m, as shown in the bird's-eye view in figure a. What minimum coefficient of static friction, μs, between the tires and the roadway will allow the car to make the circular turn without sliding? B) At what maximum speed can a car negotiate a turn on a wet road with coefficient of static friction 0.215without sliding out of control?...
will the acceleration of a car with the same when the car travels around a sharp...
will the acceleration of a car with the same when the car travels around a sharp curve at a constant 60km/hr as when it travels around a gentle curve at the same speed explain?
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT