The phrase "accelerating smoothly" is correct and usable in written English.
It can be used to describe a process or action that is increasing in speed without any abrupt changes or interruptions.
Example: "The car was accelerating smoothly as it merged onto the highway, providing a comfortable ride for the passengers."
Alternatives: "gaining speed steadily" or "increasing speed gradually."
"He thought he would embarrass himself". Friends talk about "his motor racing faster," conjuring up the image of a sports car accelerating, smoothly at first, and then taking the curves ever more recklessly as the years passed.
Looking tanned and relaxed, she won the 40-lap scratch race with her usual tactical acumen, not panicking when her Great Britain team-mate Ciara Horne stole a 50m lead with three laps of the 40 remaining, and accelerating smoothly past her around the final bend to lead the field across the line.
The complexity in the task was defined by the goals of comfort (braking and accelerating smoothly), time-accuracy (maintaining the stopping pattern), and regulating speeds effectively.
And the modest turbo lag, which is hardly noticeable in straight-line acceleration, makes it a bit tricky to accelerate smoothly through a curve.
The gas pedal and 4-speed transmission misinterpret messages from your right foot, making it hard to hold a steady speed or accelerate smoothly.
Not that many scooterists will try this, but the C 600's powertrain accelerates smoothly and decently even with a 250-pound passenger on the back.
In a test on local streets, the Skeletor accelerated smoothly and ran quietly, although its vaporous steering would have been rejected by a clown car manufacturer.
Shiancoe ran pass patterns this morning, on the second day of the Giants' three-day rookie minicamp, and accelerated smoothly and swiftly, his feet hardly lifting off the ground.
On a quick test drive on the rural roads surrounding Ms. Raphael's house, the Smart, with its 600-cubic-centimeter turbocharged engine (available in 45- and 55-horsepower variations), accelerated smoothly, without sounding as if it were straining for its life.
The F-150 accelerates smoothly and briskly.
The 3.5L V6 power plant took an iron foot to get up and go, but it accelerated smoothly.
