Uniform Circular Motion

The first equation of motion is,

• u = v+at

• v = u +at

• a = u+v/2

• a = u -v/2

The Second equation of motion is

• s = ut +1/2 at2

• v = st + 1/2 at2

• s = vt + 1/2 at2

• a = ut + 1/2 vt2

Third Equation of motion is ,

• v2 = a2 +2us

• u2 = v2 +2as

• v2 = u2 +2as

• a2 = u2 + 2vs

The brakes applied to a car produce an acceleration of 4 m s-2 in the opposite direction to the motion. If the car takes 2 s to stop after the application of brakes, calculate the initial velocity of a car.

• 8 m/s

• 6 m/s

• 2 m/s

• 4 m/s

Tags

NGSS.HS-PS2-1

A car accelerates uniformly from 10 m/s to 20 m/s in 5 sec. Calculate its acceleration ,

• 6 m/s2

• 2 m/s2

• 4 m/s2

• 40 m/s2

Tags

NGSS.HS-PS2-1

Slope of velocity - time graph is,

• Displacement

• Distance

• Acceleration

• None of the above

Area in velocity - time graph is

• Distance

• Displacement

• Acceleration

• Speed

The change in the velocity could be due to

• Change in its magnitude

• Change in its direction

• Change in its direction or Change in magnitude

• All of the above

The motion of an athlete moving along a circular path is

• linear motion

• accelerated motion

• non - accelerated motion

• oscillatory motion

Tags

NGSS.HS-PS2-1

Slope of Distance- time graph is,

• Speed

• Velocity

• Acceleration

• Displacement