# physics

A new SpaceX rocket is being tested and launches from the ground. The first stage rocket engine provides constant upward acceleration during the burn phase. After the first stage engine burns out, the rocket has risen to 105.0 m and acquired an upward velocity of The second stage fails to fire. The rocket continues to rise, reaches maximum height, and falls back to the ground. Neglect air resistance. The time interval during which the rocket engine provided the upward acceleration, is closest to

A. 3.0 s.

B. 4.2 s.

C. 1.5 s.

D. 1.7 s.

E. 4.0 s.

1. 👍
2. 👎
3. 👁

## Similar Questions

1. ### Science

4. A model rocket with a mass of 0.2 kg, with a motor that can provide a force of 100 N. A second model rocket is being built with the same motor, but is being designed to accelerate half as much as the first rocket. What kind of

2. ### physics

Two rockets with the same mass are. Accelerated. Rocket A accelerates twice as fast as Rocket B. Which statement is correct? The motor in rocket A is four times as powerful as the motor and in rocket B The motor in rocket A Is

3. ### Algebra 2 h

A model rocket is launched from the top of a building. The height (in meters) of the rocket above the ground is given by h( t) = -16t²+ 96t + 14, where t is the time (in seconds) since the rocket was launched. What is the

4. ### pre ap math

a toy rocket is launched from a platform that is 48 feet high. the rockets height above the ground is modeled by h=-16t^2+32t+43. find the maximum height of the rocket find the time it will take for the rocket to reach the ground.

1. ### physics

A small weather rocket weighs 14.7 N. The rocket is carried up by a balloon. The rocket is released from the balloon and fired, and its engine exerts an upward force of 10.2 N on the rocket. What is the acceleration of the rocket?

2. ### physics

When it is 152 m above the ground, a rocket traveling vertically upward at a constant 9.50 m/s relative to the ground launches a secondary rocket at a speed of 12.4 m/s at an angle of 50.0 degrees above the horizontal, both

3. ### Calculus

If a rocket is shot vertically upward from the ground with an initial velocity of 192 ft/sec. a. When does it reach its maximum height above the ground? b. What is the maximum height reached by the rocket? c. How long does it take

4. ### physics

Two rockets with the same mass are accelerated. Rocket A accelerates twice as quickly as rocket B. Which statement is correct?(1 point) The motor in rocket A is half as powerful as the motor in rocket B. The motor in rocket A is

1. ### physics

A catapult launches a test rocket vertically upward from a well, giving the rocket an initial speed of 79.0 m/s at ground level. The engines then fire, and the rocket accelerates upward at 3.90 m/s2 until it reaches an altitude of

2. ### Mathematics

A toy rocket is launched from a 3m platform, at 8.1 m/s. The height of the rocket is modelled by the equation h= -4.9t^2 + 8.1t + 3, where h is the height, in metres, above the ground and t is the time, in seconds. 1. After how

3. ### physics

A rocket is fired at a speed of 75.0 m/s from ground level, at an angle of 64.7¡ã above the horizontal. The rocket is fired toward an 11.0 m high wall, which is located 25.0 m away. The rocket attains its launch speed in a

4. ### Physics I

Suppose a rocket launches with an acceleration of 32.0m/s^2. What is the apparent weight of an 95-kg astronaut aboard this rocket?