What happens to the motion of an object that is thrown upward? O Neither its velocity nor its acceleration is zero. O Its velocity is not zero, but its acceleration is zero. O Both its velocity and acceleration are zero. O Its velocity is zero, but its acceleration is not zero.
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- Is it possible for an object to have zero velocity and constant nonzero acceleration? O Yes, but only if it is not moving at all. O No, if its velocity is zero its acceleration must also be zero. Yes, all objects with zero velocity have nonzero acceleration. Yes, but its velocity must only be zero for an instant. O No, if its acceleration is not zero its velocity cannot be zero.You leave your house and drive to your friend's house, where you stay a while. Then you come back home. Which of the following must be true of your trip? O Your instantaneous velocity was never zero. O Your net displacement was not zero. Your acceleration was constant. Your average speed was zero. Your average velocity was zero.Which of the following situations is impossible? O A. An object has velocity directed east and acceleration directed east. B. An object has zero velocity but nonzero acceleration. OC An object has constant nonzero velocity and changing acceleration. O D. An object has constant nonzero acceleration and changing velocity. O E. An object has velocity directed east and acceleration directed vwest.
- A ball thrown upwards reaches a maximum height and then comes back down to the original level. As the ball is going upwards the velocity and acceleration both point up. O the velocity points up and the acceleration down. O the velocity points down and the acceleration up. O the velocity and acceleration both point down. O the acceleration is zero.Which of the following statements describe an object moving with 1.0 m/s? acceleration? O The object spends one second to cover one meter. O The object moves with increasing acceleration. O The object covers distance linearly. O The object adds one meter per second in its velocity every second.What should a graph of the velocity vs time look like if it shows an object moving to the left at a constant velocity? Select one: O An upwards curved parabola. O A downwards curved parabola. O A straight line with zero slope that is below the x-axis. O A straight line sloping downward. O A straight line sloping upward. O A straight line with zero slope that is above the x-axis.
- Assuming the positive direction points North, which of these situations results in a positive velocity and a negative acceleration? A car driving North and speeding up. A plane flying North and slowing down. O A bicycle riding South and speeding up. O An athlete running South and slowing down. O t is impossible to have a positive velocity and a negative acceleration.A basketball player throws a basketball into the air and watches as it undergoes projectile motion. What can we say about the acceleration of the ball while it is in the air? The acceleration is zero in every direction. The acceleration is zero in the x-direction and -9.8 m/s? in the y-direction. O The acceleration is -9.8 m/s2 in every direction. O The acceleration is -9.8 m/s2 in the x-direction and 0 in the y-direction.Which of the following situations is impossible? O A. An object has velocity directed east and acceleration directed west. B. An object has velocity directed east and acceleration directed east. OC. An object has constant non-zero velocity and changing acceleration. O D.An object has zero velocity but non-zero acceleration. E. An object has constant non-zero acceleration and changing velocity.
- A ball thrown upwards reaches a maximum height and then comes back down to the original level. At the maximum height the velocity and acceleration both point up. O the velocity points up and the acceleration down. the velocity points down and the acceleration up. O the velocity and acceleration both point down. O the velocity is zero. O the acceleration is zero.A skier leaves the end of a horizontal ski jump at 22.0 m/s and falls through a vertical distance of 3.20 m before landing. Neglecting air resistance, (a) how long does it take the skier to reach the ground? (b) How far horizontally docs the skier travel in the air before landing? (Sec Section 3.4.)Consider the following combinations of signs and values for the velocity and acceleration of a particle with respect to a one-dimensional x-axis: Velocity Acceleration a. Positive Positive b. Positive Negative c. Positive Zero d. Negative Positive e. Negative Negative f. Negative Zero g. Zero Positive h. Zero Negative Describe what the particle is doing in each case and give a real-life example for an automobile on an east-west one-dimensional axis, with east considered the positive direction.