IGCSE Physics levelling start Y11 (U1-U7) hard

U1 How many cm² are in 300hm²? ("^" means "to the power of")

• 3·10^-2

• 3·10^4

• 3·10^10

• 3·10^-4

Answer explanation

300 plus 4x2 zeros

U1 How many km/h is 20m/s?

• 5.55km/h

• 72km/h

• 1.2km/h

• 333.33km/h

Answer explanation

20·3600/1000

U1 What apparatus can measure density of a liquid?

• Hydrometer

• Densiometer

• Displacement can

• Beam balance

U1 How many mm^3 are 60hL? ("^" means "to the power of")

• 6·10^18

• 6·10^4

• 6·10^6

• 6·10^9

Answer explanation

2zeros to L, =dm^3, 6zeros to mm^3

U2 Calculate the distance this object travelled.

• 120m

• 200m

• 400m

• 80m

Answer explanation

Squares under the line = 80, x5m x0.5s=200m

U2 Calculate the acceleration in section C

• 6.66m/s²

• 15m/s²

• 6.25m/s²

• 360m/s²

Answer explanation

(50-30)/(8-5)

U2 Calculate the resultant force

• 3.16N

• 10N

• 7.21N

• 52N

Answer explanation

pythagoras h²=6²+4², h=7.21

U2 A 2kg ball travelling at 6m/s bumps into a stationary 3kg ball and bounces elastically backwards at 1m/s. If there is no friction or energy loss, what is the velocity of the heavier ball after the collision?

• 3.33m/s

• 4.66m/s

• 6.66m/s

• 5m/s

Answer explanation

2·6+3·0=-1·2+3·v, so v=14/3=4.66

U3 Calculate force B of the piston in this diagram:

• 4N

• 20N

• 100N

• 12N

Answer explanation

P(A)=F/A=20/5=4=P(B)=F/3, so 20/5=F/3, so 20·3/5=12N

U3 What is the minimum pressure (Pa) this block can make on the ground if it´s mass is 10kg?

• 8.33

• 5

• 0.5

• 0.83

Answer explanation

P=F/A=mg/A=10·10/biggestA= =10·10/(5·4)=100/20=5Pa