Concepts of Velocity in Physics

What is the formula for instantaneous velocity?

• To calculate average speed

• To find the total displacement

• To determine the instantaneous velocity

• To measure the total time taken

What is the formula for average acceleration?

What is the unit of time in the SI system?

• ms^-1

• ms^-2

• m

• s

If an object travelling at ( u = 12 ) m/s and ( a = -3.0 ) ms^-², how long does it take to slow to a stop?

• 2.0 s

• 3.0 s

• 4.0 s

• 5.0 s

What is the general result of making the steps of the staircase smaller in the velocity-time graph?

• The area under the line and the area under the staircase become distinguishable.

• The area under the line and the area under the staircase become indistinguishable.

• The velocity becomes constant.

• The time becomes zero.

If a car has an initial velocity of 5.0 ms^-1 and after a displacement of 20 m, its velocity becomes 7.0 ms^-1, what is the acceleration of the car?

• 0.60 ms^-²

• 0.50 ms^-²

• 0.70 ms^-²

• 0.80 ms^-²

What is the formula used to find Δs after calculating the acceleration?

• Δs = ut + 1/2 at²

• Δs = v² - u² / 2a

• Δs = u + at

• Δs = F/m

What is the formula for the position of ball X in terms of time t?

• s_x = 1/2 at²

• s_x = at

• s_x = ut + 1/2 at²

• s_x = vt

What is the total change in position (displacement) of the object after 15 seconds?

• 50 m

• 0 m

• -50 m

• 100 m