Question

Which of the following statements about projectile motion ARE correct? Group of answer choices The velocity...

Which of the following statements about projectile motion ARE correct?

Group of answer choices

The velocity direction is changing across the motion trajectory, but the acceleration direction remains the same.

The direction of both velocity and acceleration are changing across the motion trajectory

For a free fall object(the horizontal component of the initial velocity is zero), its velocity is zero when it reaches maximum height, but its acceleration is not zero at the same time.

For a free fall object(the horizontal component of the initial velocity is zero), both its velocity and acceleration are zero when it reaches maximum height.

Homework Answers

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Which one of the following statements is not possible? An object has zero velocity and non-zero...
Which one of the following statements is not possible? An object has zero velocity and non-zero acceleration An object travels with a northward velocity and a northward acceleration An object travels with a constant velocity and a constant non-zero acceleration An object travels with a changing velocity and a constant acceleration              ____________ In a displacement vs. time graph, a sloped (non-horizontal) line indicates: The object is moving with constant, non-zero, acceleration The total displacement of the object is zero...
Two seconds after being projected from ground level, a projectile is displaced 40 m horizontally and...
Two seconds after being projected from ground level, a projectile is displaced 40 m horizontally and 53 m vertically above its launch point. Its horizontal component of initial velocity is v0x=20 m/s. Its vertical component of initial velocity is v0y=36 m/s. At the instant the projectile reaches maximum height above ground level, the displacement is x=74 m. Answer questions a, b, and c below. Show all work and details. Give explanation for your answer. a) What is the horizontal range...
A projectile has an initial velocity of 45 m/s at an angle of 53o with respect...
A projectile has an initial velocity of 45 m/s at an angle of 53o with respect to the horizontal and begins at ground level. a. What are the x and y components of the projectile’s initial velocity? b. What is the maximum height of the projectile? c. How far away from where it begins does the object strike the ground? d. What is the magnitude and direction of the projectile’s velocity at t= 3 s? e. What is the displacement...
A ball is kicked from the ground with an initial velocity V at 30° above the...
A ball is kicked from the ground with an initial velocity V at 30° above the horizontal. At the top of its trajectory, the ball’s velocity and acceleration are: Group of answer choices in the same direction both zero at right angles to one another in opposite directions
A projectile is fired from the ground (you can assume the initial height is the same...
A projectile is fired from the ground (you can assume the initial height is the same as the ground) in a field so there are no obstacles in its way. The same projectile was then fired in the same way toward a wall that is a horizontal distance (d) m from where the projectile was fired, and the projectile (as it's going down) hit the wall. If the wall were slightly farther from where the projectile was launched (the projectile...
For an object being launched at ground level at a tilted non-zero initial velocity, is the...
For an object being launched at ground level at a tilted non-zero initial velocity, is the velocity zero anywhere? Are the horizontal or vertical components of the velocity zero at any point? What is the shape of this trajectory? (Use the mathematical term). If an object is launched with a strictly horizontal initial velocity, what is the vertical component of the initial velocity? Will an object take longer, less, or the same amount of time to reach the ground if...
An object is launched from the top of a building which is 50 m tall at...
An object is launched from the top of a building which is 50 m tall at a speed of 20 m/s at an angle of 30 degrees above the horizontal. a) What is the component of the projectile's initial velocity parallel to the ground? b) What is the component of the projectile's velocity parallel to the ground at 0.5 s? c) What is the speed (magnitude of velocity) of the projectile at 3 s? d) How long does it take...
A projectile is fired from ground level at an angle of 65 ∘ above the horizontal...
A projectile is fired from ground level at an angle of 65 ∘ above the horizontal with an initial speed of 29 m/s . What is the magnitude of its instantaneous velocity at the moment it is fired? What is the direction (relative to horizontal) of its instantaneous velocity at the moment it is fired? What is the magnitude of its instantaneous velocity the moment it reaches its maximum height? What is the direction (relative to horizontal) of its instantaneous...
A projectile (Object A) sits just on the edge of a 1.500 m high ledge. Its...
A projectile (Object A) sits just on the edge of a 1.500 m high ledge. Its target (Object B) sits at rest directly below it. Object A is launched into the air with an acceleration of 3.000 m/s2 at an angle of 30o above the horizontal. After 1.000~s, Object A is in free fall. At the same moment the projectile is launched into the air, Object B starts moving from rest on the ground in the same general direction as...
Projectile Motion: A rock is thrown into the air with an initial velocity of 40 m/s...
Projectile Motion: A rock is thrown into the air with an initial velocity of 40 m/s and 60 degrees above the horizontal. (a) What is the time when the velocity makes 45 degrees above the horizontal? (b) What is the time when the velocity makes 45 degrees below the horizontal? (c) Does it exist when the velocity makes zero degrees with the horizontal? If yes, when? (d) Does it exist when the velocity makes 90 (or -90) degrees with the...