The velocity-time graph of a body is shown in figure, the acceleration of the body for time intervals (0 to 10 sec) , (10 to 15 sec) and (15 to 25 sec) are:

• 2 m/s² , 1 m/s² , 2 m/s²

• 1 m/s² , 2 m/s² , 3m/s²

• 2 m/s² , 0 m/s² ,3 m/s²

• 0.5 m/s² , infinity m/s² ,0.33 m/s²

Tags

NGSS.HS-PS2-1

A train takes 1 hour to go from one station to another , it travels at a speed of 20 km/hr for half an hour and 30 km/hr for another half an hour. The average speed of the train is:

• 25 km /hr

• 24 km/hr

• 28 km/hr

• 23 km/hr

The acceleration of a particle starting from rest varies with time according to the relation a=bt+c , Then the velocity of the particle after time t must be:

• 2bt²+ct

• 1/2 bt²+ct

• bt²+ct

• 1/2(bt²+ct)

Tags

NGSS.HS-PS2-1

A police car running with a speed of 120 km/hr chases a truck running ahead with a speed of 110 km/hr , the relative speed of car with truck is:

.

• 115 km/hr

• 10 km/hr

• 330 km/hr

• 120/110 km/hr

A projectile is fired a velocity of 150 meters per second at an angle of 30 degrees with the horizontal. What is the magnitude of the vertical component of the velocity at the time the projectile is fired?

• 150. m/s

• 130. m/s

• 75. m/s

• 225 m/s

A particle has initial velocity (2j + 3k) and acceleration ( 0.3j + 0.2k) . The magnitude of velocity after 10 seconds will be:

• 9 √2 units

• 5 √2 units

• 5 units

• 9 units

Tags

NGSS.HS-PS2-1

A missile is fired for maximum range with initial velocity 20 m/s, the range of the missile is : ______ ( take g= 10 m s^-2)

• 40 m

• 50 m

• 60 m

• 20 m

Which vector represents the acceleration of the ball performing uniform circular motion?

• A

• B

• C

• D

Tags

NGSS.HS-PS2-1

Which of the following depict the direction of velocity of the ball performing uniform circular motion?

• A

• B

• C

• D

The time taken for one complete revolution is called the...

• Period

• Frequency

• Angular velocity

Tags

NGSS.HS-PS4-1