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WorksheetsNewton's Laws review game
Total questions: 15
Worksheet time: 1hrs 15mins
If the gravity disappears when an object is in free fall, what will happen?
Floats in the air and stay still
The speed decreases
Keep going down at a constant speed
We don't know
A car is moving in a straight line in an east-west direction, there is a wooden block on it. Suddenly, the block falls westward. What is the possible movement of the car?
Moving to the east at a great and constant speed
Moving to the east at a decreasing speed
Moving to the east at a increasing speed
Moving to the west at a increasing speed
What is correct about inertia?
An object in the space does not have inertia
All objects have inertia
Heavier objects have less inertia
We wear seat belts to reduce inertia
A traveller jumps on the deck(甲板). Where will this traveller land?
(ignore air resistance) (reference the DECK参照甲板）
In front of the jumping point
At the jumping point
Behind the jumping point
We don't know
If a man jumps from a moving car, then he will
Fall in the direction of the moving car
Fall in the opposite direction of the moving car
Fall to the right
Fall to the left
On a rough surface, an object's mass is m. Someone exerts a horizontal force F to push it, then causes an acceleration of a. The friction force on the object is F1. If F changes to 2F, what will happen?
The acceleration is still a
The acceleration changes to 2a
The friction force is still F1
The friction force changes to 2F1
A man of mass m is standing in an elevator. The elevator is going up with an increasing speed. The acceleration is 1/3g, g is gravity acceleration. The man's pressure on the bottom of the elevator is
mg
1/3mg
2/3mg
4/3mg
A mass which weighs 2kg is on a smooth surface. When we pull it with a force F=10N, so what the acceleration will be
5m/s2
0.2m/s2
20m/s2
12m/s2
When we push a table but it does not move, it's probably because
The acceleration of the table is too small to be observed
The force we exert is smaller than the friction. So the acceleration is less than 0
The net force(合力) of all the forces is zero, so the acceleration is 0
Physics cannot explain it :(
An object which weighs 1kg is moving up with an increasing speed. The acceleration of it is 7m/s2, the resultant force on the object is
3N
7N
13N
17N
Which one is true?
When an egg hits a stone, the egg will break but the stone won't. That's because the force stone exerts on egg is bigger
Object A is lighter than Object B. When A is stationary(静止) on B, the force A exerts on B is smaller
A book stays on the table. The pressure of book on the table and normal force of table on book is a pair of action and reaction
A book stays on the table. The pressure of book on the table and normal force of table on book is a pair of balancing forces
About Newton's 3rd Law, which one is correct?
Action and reaction act on the same object
Action and reaction have same direction
The action and reaction are equal, so effects can be cancelled out(效果可以抵消)
Action and reaction forces have the same properties(力的性质相同)
While pulling a cart, the horse give cart a force forward first, then the cart gives the horse a backward reaction.
True
False
A weightlifter(举重运动员) can lift 100kg, can he apply 1000N on a feather?
No
Yes
When hanging a mass with a rope, and the mass is in balance(处于平衡状态). The balance force(平衡力) of gravity on the mass is___, The reaction force of gravity on the mass is___.
The tension force of rope on the weight; The attraction of heavy object to the earth
The attraction of heavy object to the earth; The tension force of rope on the weight
The tension force of rope on the weight; The tension force of rope on the weight
The attraction of heavy object to the earth;The attraction of heavy object to the earth
