 µ IB | SUVATS

10 quick questions

10 minutes maximum! (can you do it in 5?)

Q1-5...

A tennis ball - initially at rest - is dropped from a height of 5 m. 1. Which of these answers correctly labels the letters 's', 'v' and 'u' in the 'suvats' equations?

• A. s= speed, v = initial velocity, u = final velocity
• B. s= speed, v = final velocity, u = initial velocity
• C. s= displacement, v = initial velocity, u = final velocity
• D. s= displacement, v = final velocity, u = initial velocity

2. Which of these answers correctly gives the values for 's', and 'u' and 'a' in the 'suvats' equations? (No units are given).

• A. s= 0, a= 0, u = 0
• B. s= 0, a = 10, u = 0
• C. s= 5, a = 10, u = 0
• D. s= 5, a = 10, u = 10

3. Which of these equations can be used without further calculation to find the impact velocity?

• A. v = u + at
• B. s= ut + ½ at2
• C. v2 = u2 + 2as
• D. s = ½ (u+v).t

4. What is the impact velocity of the ball?

• A. 5 ms-1
• B. 10 ms-1
• C. √50 ms-1
• D. 100 ms-1

5. How long did it take for the ball to fall?

• A. 2 s
• B. 0.5 s
• C. 1 s
• D. 10 s

6&7. A ball is rolled down a steep slope. The initial velocity is 2 ms-1 and it accelerates at a rate of 4 ms-2 for 5 seconds.

6. What is the final velocity of the ball?

• A. 20 ms-1
• B. 22 ms-1
• C. 24 ms-1
• D. 10 ms-1

7. How far does the ball roll in this time?

• A. 8 m
• B. 28 m
• C. 50 m
• D. 60 m

8-10. A stone is thrown horizontally at 10 ms-1 from a cliff of height 5 m.

Air resistance can be ignored. 8. Which of these correctly describes the changes in the horizontal and vertical components of velocity of the stone?

 Horizontal velocity Vertical velocity A constant increasing B increasing constant C constant constant D decreasing increasing

9. What is the vertical velocity of the stone on impact?

• A. 5 ms-1
• B. 10 ms-1
• C. √50 ms-1
• D. 100 ms-1

10. The stone takes 1 second to reach the ground. How far from the cliff edge does the stone land?

• A. 10 m
• B. 20 m
• C. 30 m
• D. 40 m