WorksheetsLSS Pressure, Forces and Energy
Total questions: 16
Worksheet time: 34mins
What is the formula for pressure?
F/A
F x A
A/F
A x F
Calculate the pressure exerted by one leg of a table if the table has a weight of 600N and each leg of the table has a contact area of 0.0015 m2
100000 Pa
0.9 Pa
400000 Pa
3.6 Pa
Haruki has a mass of 50 kg. Calculate the pressure exerted on the floor if each of his shoes has a contact area of 0.003 m2. (Earth g = 10 N/kg)
83333 Pa
8333 Pa
166666 Pa
16666 Pa
Aloysius has a mass of 45 kg. Calculate his weight. (Earth g = 10 N/kg)
450 N
45 N
4.5 N
Aloysius became the first Singaporean to land on the Moon. He also achieved a new weight. Calculate his new weight if his mass is 45 kg. (Moon's g = 1.7 N/kg)
26.5 N
76.5 N
45 N
What is the formula for weight?
weight = mass x gravitational field strength
weight = mass / gravitational field strength
weight = gravitational field strength / mass
A spring has an extension of 3 cm when a 40 N weight is hung. What is the extension when a 60 N weight is hung?
4.5 cm
2 cm
Need more information to solve
A spring has a length of 14 cm when a 50 N weight is hung on it. It has a length of 18 cm when a 100 N weight is hung on it. What is its original length?
10 cm
16 cm
4 cm
Not enough information to solve.
Which of the below does not decrease friction?
Wearing high heel shoes instead or sports shoes.
Adding oil to lubricate car engines.
Wearing roller-blades instead of running normally.
Driving an streamlined car instead of a van.
How much work is done when a box is pushed with a force of 20 N for 20 metres?
1 J
No work is done
400 J
Why does a rollercoaster zoom down without needing any motors or engine supplying it power?
Its gravitational potential energy (GPE) is converted to kinetic energy (KE)
Its kinetic energy (KE) is converted to gravitational potential energy (GPE)
Its gravitational potential energy (GPE) is equal to kinetic energy (KE)
It has no energy
What is the formula for gravitational potential energy (GPE)?
m x g x h
m x g / h
m x g
1/2 mv2
What is the formula for kinetic energy (KE)?
m x g x h
m x g / h
m x g
1/2 mv2
A car of mass 1300 kg travels up a multi-storey carpark, gaining a height of 16 metres.
Calculate the gain in gravitational potential energy (G.P.E). Take g = 10.
(a) J
A tennis ball is released 1 metre from the ground. It possesses 150 J of gravitational potential energy (G.P.E). Determine the kinetic energy (K.E.) of the ball just before it hits the ground.
(a) J
CHALLENGING QUESTION:
Ying Song kicks a football of mass 700 grams. It possesses 2240 J of kinetic energy (K.E.).
Determine its velocity. (K.E. = 1/2 mv2)
(a) m/s
