Answer 1.1: C. 32N, 8N
Answer 1.2: A. smaller than the force exerted by the windshield on the bug.
Answer 1.3: A. 2a
Answer 1.4: C. Fg - FAy
Answer 1.5: B. 2m in kg
Question 1.1 [2 marks]
Four vectors act on a point as indicated below.
Figure 1: Diagram showing four vectors.
The magnitudes of the resultant/net forces in the horizontal direction (FX) and in the vertical direction (FY) are ...
FX
FY
A
32N
38N
B
8N
38N
C
32N
8N
D
240N
345N
5
Question 1.2 [2 marks]
A bug flies into a car’s windshield. The magnitude of the force exerted by the bug on the windshield is _______.
A. smallerthantheforceexertedbythewindshieldonthebug.
B. equaltotheforceexertedbythewindshieldonthebug.
C. largerthantheforceexertedbythewindshieldonthebug.
D. equal to the normal force exerted by the windshield on the bug.
Question 1.3 [2 marks]
A net force F is applied on an object of mass m (measured in kg) and causes an acceleration of a (measured in m∙s-2). When the net force F on the same object is halved, the resulting acceleration, in m∙s-2, will be ...
A. 2a B. 12 a C. 4a D. 14 a
Question 1.4 [2 marks]
A lawnmower is pushed across the ground with a force FA at an angle of Ө with the horizontal.
Figure 2: Diagram showing a man pushing a lawnmower.
6
The normal force, FN on the lawnmower is ______. A. Fg
B. Fg + FAy C. Fg - FAy D. Fg + FA
Question 1.5 [2 marks]
The mass of a man on planet R is m (measured in kg). The acceleration due to gravity on planet S is half the acceleration due to gravity on planet R. The mass of the same man on planet S will be ...
A. Thevalueminkg B. 2minkg
C. 12minkg
D. 4m in kg
Answer 1.2: A. smaller than the force exerted by the windshield on the bug.
Answer 1.3: A. 2a
Answer 1.4: C. Fg - FAy
Answer 1.5: B. 2m in kg