Physics, 28.01.2020 08:31 kaffolter25

The velocity of a projectile at launch has a horizontal component vh and a vertical component vv. when the projectile is at the highest point of its trajectory, identify the vertical and the horizontal components of its velocity and the vertical component of its acceleration. consider air resistance to be negligible

Answers: 1

Show answers

Answers

At the highest point, the final vertical velocity is zero, and the final horizontal velocity is equal to the initial horizontal velocity.

The acceleration due to gravity acting on the object is always directed downwards.

In a projectile motion, the velocity of projected upwards decreases as the object moves upwards and eventually become zero at the maximum height.

The velocity of an object projected upwards is given as;

v_y = v_0 -gt

At the highest point, the final vertical velocity is given as;

v_y_f= 0

The horizontal velocity is always constant because it is not affected by gravity.

At the highest point, the final horizontal velocity is given as;

v_x_f = v_x_0

The acceleration due to gravity acting on the object is always directed downwards.

Learn more here:link

Answer from: tegaoks6843

- horizontal component of the velocity: v_h (because it is constant)

- vertical component of the velocity: 0

- vertical component of the acceleration: -g=-9.8 m/s^2 (downward)

Explanation:

The motion of a projectile consists of two independent motions:

- Along the horizontal direction, there are no forces acting on the projectile (if we neglect air resistance), therefore the horizontal acceleration is zero and the horizontal component of the velocity, vh, is constant

- Along the vertical direction, there is only one force acting on the projectile: the force of gravity, downward, which produces a constant downward acceleration of g=9.8 m/s^2 . As a consequence, the vertical component of the velocity changes according to

v_v(t) = v_v-gt

where vv is the initial vertical velocity and t the time. According to this equation, the vertical component of the velocity decreases first, then becomes zero at the point of maximum height, then becomes negative (= changes direction and points downward)

So, in summary, at the highest point of the trajectory we have:

- horizontal component of the velocity: v_h (because it is constant)

- vertical component of the velocity: 0

- vertical component of the acceleration: -g=-9.8 m/s^2 (downward)

Answer from: Quest

answer: option c.

explanation:

Answer from: Quest

Examples: mental health problems cardiovascular disease obesity and other eating disordersmenstrual problems skin and hair problems

Another question on Physics

Physics, 22.06.2019 06:00

Aball is thrown upward. at a height of 10 meters above the ground, the ball has a potential energy of 50 joules (with the potential energy equal to zero at ground level) and is moving upward with a kinetic energy of 50 joules. what is the maximum height h reached by the ball? consider air friction to be negligible. 1. h ≈ 10 m 2. h ≈ 50 m 3. h ≈ 30 m 4. h ≈ 40 m 5. h ≈ 20 m 003 10.0 points which of the two object shown below has the greatest kinetic energy? a m b 1 2 m v 2v 1. kinetic energies are the same. 2. a 3. b 4. unable to determine. 004 10.0 points tim, with mass 74.6 kg, climbs a gymnasium rope a distance of 3.1 m. the acceleration of gravity is 9.8 m/s 2 . how much potential energy does tim gain? answer in units of j. 005 10.0 points a car is moving at 64 miles per hour. the kinetic energy of that car is 5 × 105 j. how much energy does the same car have when it moves at 111 miles per hour? answer in units of j. 006 10.0 points an 102 kg man climbs up a 1 m high flight of stairs. the acceleration of gravity is 9.81 m/s 2 . w

Answers: 3

Answer

Physics, 22.06.2019 07:20

If the ama of the inclined plane below is 2, calculate the ima and efficiency. ima = efficiency =

Answers: 1

Answer

Physics, 22.06.2019 17:20

In a system with only a single force acting upon a body, what is the relationship between the change in kinetic energy and the work done by the force? answers: work is equal to the change in kinetic energy.work depends on the square of the change in potential energy.work is equal to the negative of the change in kinetic energy.work is equal to the square of the change in kinetic energy

Answers: 2

Answer

Physics, 23.06.2019 09:50

James joule carefully measured the difference in temperature of the water at the top and bottom of a waterfall. why did he expect a difference

Answers: 3

Answer

You know the right answer?

The velocity of a projectile at launch has a horizontal component vh and a vertical component vv. wh...

Questions