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Worksheets入学测试
Total questions: 25
Worksheet time: 19mins
A man standing on a chair weighs 800 N. In order for the chair to support the man, the chair must exert an upward force of:
more than 800 N.
less than 800 N.
800 N.
It depends on how many pounds there are in 800 N.
A box is sliding along a frictionless, horizontal surface. Which of the following describes the motion of the box as it continues to slide along the surface?
The box will slow down as it uses up its speed.
The box will continue to slide with constant speed only if it is rolling downhill.
The box will slow down as it runs out of the force of motion.
The box will continue to slide with constant speed.
The Velocity vs. Time graph represents the motion of an object. When does the object have a net force acting on it?
From A to B and then from B to C but not at time B.
From A to B
From A to C
From B to C
Never; the speed is constant.
A 60 kilogram physics student would weigh 1560 newtons on the surface of planet X. What is the magnitude of the acceleration due to gravity on the surface of planet X?
0.038 m/s/s
6.1 m/s/s
9.8 m/s/s
26 m/s/s
What is the SI unit of force?
1 m/s^2
1 N
1 kg.m/s
1 kg.m/s
Which of the following are examples of non-contact forces?
Drag
Applied force
Gravity
Friction
Uniform linear motion has ............... .
Constant speed, variable velocity
Constant speed, constant velocity
Variable speed, constant velocity
Variable speed, variable velocity
What is the resultant force acting on a skydiver with a weight of 700 N and a drag force of 600 N?
1300 N upwards
100 N downwards
100 N upwards
1300 N downwards
What is the momentum of a 500g car travelling at 30 m/s? Give your answer in kgm/s without the units. (momentum = mass x velocity)
(a)
An object that experiences a net force of 80 Newtons speeds up from 10 m/s to 20 m/s over a period of 5 seconds. What is the mass of the object?
8 kg
40 kg
160 kg
800 kg
1600 kg
The force that acts when two surfaces rub over one another.
Force
Newton
Air resistance
Friction
The force required to give a mass of 1kg an acceleration of 1 m/s2
Newton
Force
Air resistance
Drag
Friction is a force that acts in the _____________________ direction of a moving object to slow it down.
same
fastest
equal
opposite
What is the standard unit MASS is measured in?
kilograms
These are examples of forces in physics.
compass rose, map and magnetism
the water cycle
landing on the moon
gravity, magnetism, elastic, balanced and unbalanced
Which driver has an equal distance and displacement at B?
1
2
3
