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English, mathematics and physics olympiad 2 year
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Mass differs from weight in that:
A 1000kg airplane moves in straight level flight at constant speed. The air friction drag is 1800 N. The net force on the plane is:
A book rests on a table, exerting a downward force F on the table. The reaction to this force is:
A projectile in flight explodes into several fragments. Its momentum immediately after this explosion:
The "reaction" force does not cancel the "action" force because:
A man, standing at rest on a horizontal frictionless floor, might get himself moving by:
Two bodies of unequal mass, placed on a frictionless surface, are acted on by equal horizontal forces for equal times. Just after these forces are removed, the body of greater mass will have:
A body at rest is capable of doing work if:
A 2.5 kg stone is released from rest and falls toward the earth after 4.0 s, its momentum (in kg'm/s) is:
A 10 kg block of ice is at rest on a frictionless horizontal surface. A 1.0 N force is applied in an easterly direction for1.0 s. During this time interval, the block: