PPSC PHYSICS-One Dimensional Motion (SMART INSTITUTE)

01- A particle moves along the x axis from xi to xf . Of the following values of the initial and final coordinates, which results in the displacement with the largest magnitude?

02- A particle moves along the x axis from xi to xf . Of the following values of the initial and final coordinates, which results in a negative displacement?

03- The average speed of a moving object during a given interval of time is always:

The magnitude of its average velocity over the interval

the distance covered during the time interval divided by the time interval

one-half its speed at the end of the interva

its acceleration multiplied by the time interval

One-half its acceleration multiplied by the time interval.

04-Two automobiles are 150 kilometers apart and traveling toward each other. One automobile is moving at 60 km/h and the other is moving at 40 km/h mph. In how many hours will they meet?

05-A car travels 40 kilometers at an average speed of 80 km/h and then travels 40 kilometers at an average speed of 40 km/h. The average speed of the car for this 80-km trip is:

06-A car starts from Hither, goes 50 km in a straight line to Yon, immediately turns around, and returns to Hither. The time for this round trip is 2 hours. The magnitude of the average velocity of the car for this round trip is:

07- A car starts from Hither, goes 50 km in a straight line to Yon, immediately turns around, and returns to Hither. The time for this round trip is 2 hours. The average speed of the car for this round trip is:

08-The coordinate of a particle in meters is given by x(t) = 16t − 3.0t 3, where the time t is in seconds. The particle is momentarily at rest at t =

09-A drag racing car starts from rest at t = 0 and moves along a straight line with velocity given by v = bt2, where b is a constant. The expression for the distance traveled by this car from its position at t = 0 is:

10- A ball rolls up a slope. At the end of three seconds its velocity is 20 cm/s; at the end of eight seconds its velocity is 0. What is the average acceleration from the third to the eighth second?

11-An object starts from rest at the origin and moves along the x axis with a constant acceleration of 4 m/s 2 . Its average velocity as it goes from x = 2 m to x = 8 m is:

12- Of the following situations, which one is impossible?

A body having velocity east and acceleration east

A body having velocity east and acceleration west

A body having zero velocity and non-zero acceleration

A body having constant acceleration and variable velocity

A body having constant velocity and variable acceleration

13- Throughout a time interval, while the speed of a particle increases as it moves along the x axis, its velocity and acceleration might be:

positive and negative, respectively

Negative and positive, respectively

Negative and negative, respectively

Negative and zero, respectively

positive and zero, respectively

14-A particle moves on the x axis. When its acceleration is positive and increasing:

15-The position y of a particle moving along the y axis depends on the time t according to the equation y = at − bt2. The dimensions of the quantities a and b are respectively:

16-A car starts from rest and goes down a slope with a constant acceleration of 5 m/s2. After 5 s the car reaches the bottom of the hill. Its speed at the bottom of the hill, in meters per second, is:

17-A car moving with an initial velocity of 25 m/s north has a constant acceleration of 3 m/s2 south. After 6 seconds its velocity will be:

18-An object with an initial velocity of 12 m/s west experiences a constant acceleration of 4 m/s2 west for 3 seconds. During this time the object travels a distance of:

20-At a stop light, a truck traveling at 15 m/s passes a car as it starts from rest. The truck travels at constant velocity and the car accelerates at 3 m/s2. How much time does the car take to catch up to the truck?

21-A ball is in free fall. Its acceleration is:

Downward during both ascent and descent

Downward during ascent and upward during descent

Upward during ascent and downward during descent

Upward during both ascent and descent

Downward at all times except at the very top, when it is zero

22-A ball is in free fall. Upward is taken to be the positive direction. The displacement of the ball during a short time interval is:

Positive during both ascent and descent

Negative during both ascent and descent

Negative during ascent and positive during descent

Positive during ascent and negative during descent

None of the above

24-Which one of the following statements is correct for an object released from rest?

The average velocity during the first second of time is 4.9 m/s

During each second the object falls 9.8 m

The acceleration changes by 9.8 m/s 2 every second

The object falls 9.8 m during the first second of time

The acceleration of the object is proportional to its weight

25-A freely falling body has a constant acceleration of 9.8 m/s2. This means that:

The body falls 9.8 m during each second

the body falls 9.8 m during the first second only

the speed of the body increases by 9.8 m/s during each second

The acceleration of the body increases by 9.8 m/s2 during each second

The acceleration of the body decreases by 9.8 m/s2 during each second

26-An object is shot vertically upward. While it is rising:

Its velocity and acceleration are both upward

Its velocity is upward and its acceleration is downward

Its velocity and acceleration are both downward

its velocity is downward and its acceleration is upward

Its velocity and acceleration are both decreasing

27-An object is thrown straight up from ground level with a speed of 50 m/s. If g = 10 m/s2 its distance above ground level 1.0 s later is:

28-An object is thrown straight up from ground level with a speed of 50 m/s. If g = 10 m/s2 its distance above ground level 6.0 s later is:

29-At a location where g = 9.80 m/s2, an object is thrown vertically down with an initial speed of 1.00 m/s. After 5.00 s the object will have traveled:

30-An object is thrown vertically upward at 35 m/s. Taking g = 10 m/s2, the velocity of the object 5 s later is:

PPSC PHYSICS-One Dimensional Motion (SMART INSTITUTE)

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