Question

1. Which statement about scalars and vectors is correct?
A. A scalar has direction but no size.
B. A scalar has size but no direction.
C. A vector has direction but no size.
D. A vector has size but no direction.
2. Which quantity is a vector? A. energy
B. force C. speed D. time
3. Before marking the finishing line on a running track, a groundsman measures out its 100 m length. Which instrument is the most appropriate for this purpose?
A. measuring tape
B. metre rule
C. 30 cm ruler
D. Micrometer

Answer 1

Answer:

1.A

2.C

3.B

these are the correct answers

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Explanation:

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Answer 2

Answer:

1.B.scaler has size but no direction.

2.B . Force is a vector quantity.

3.B metre rule

Scaler quantity are those which have only magnitude but no direction and vector have both magnitude and direction.

.

Force = mass * displacement ( here both magnitude are present and direction is also specific for displacement)