Motion in one dimention

An object moving on a straight line changes its velocity from 60 m/s to

150 m/s in one minute. Calculate its average acceleration.

• 1.5 m/s²

• 15 m/s²

• 6.5 m/s²

• 90 m/s²

A dog and a rabbit are 30 meters apart and the dog ran behind the

rabbit at 10 m/s, then the rabbit Runway from the dog at 5 m/s . After

how many times they will meet ?

• 6.0 s

• 7.6 s

• 5.7 s

• 9.2 s

What is the speed of a car that travels 9 km at an average speed of 30 km/h and another 9 km at an average speed of 0 km/h.

• 55 km/h

• 40 km/h

• 0 km/h

• 35 km/h

ball is kicked up in the air , calculate the acceleration of the ball ?

• 1.20 m/s²

• 4.7 m/s²

• 10 m/s²

• 81.3 m/s²

A ball is thrown vertically down with a speed of 5 m/s from the edge of a 30 meter high building. How long it will take the ball to hit the ground?

• 6 s

• 12 s

• 4 s

• 2 s

Q10) The velocity of a particle moving along the x-axis is given by v =

40 − 5t² , find its acceleration at t = 2s.

• –10 m/s²

• +20 m/s²

• – 20 m/s²

• 10 m/s²

A particle is moving along the x axis with 2. 0 m/s²

constant acceleration. Calculate the time required to move the particle from x = 4 m.

• 1.3 s

• 1.6 s

• 0.8 s

• 1.0 s

An object covers 55 m in 8.5s while slowing down to a final speed of 2.8 m/s. What is its acceleration ?

• – 0. 59 m/s²

• – 0. 73 m/s²

• – 0. 86 m/s²

• – 0. 45 m/s²

The position of a particle moving on the x-axis is given by the equation x(t) = 5+t²-t³, where t is in seconds and x in meters. Find its instantaneous velocity at t = 2 s .

• – 8 m/s

• – 2 m/s

• 8 m/s

• – 1 m/s

The velocity of an object is given as a function of time by v(t) =4t-3t², where t is in seconds. Its average velocity over the interval from (t = 0 s) to (t = 6 s) is:

• -24 m/s

• -3 m/s

• 0 m/s

• -8 m/s