Motion in a Plane Test

Result

Motion in a Plane Test - 17

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Weekly Quiz Competition

Question 1
4 / -1

A

B

C

D

Solution
Question 2
4 / -1

The speed of a boat is 5 km/h in still water. It crosses a river of width 1.0 km along the shortest possible path in 15 minutes. The velocity of the river water is (in km/h)

A
5

B
1

C
3

D
4

Solution
Question 3
4 / -1

Two particles A and B are connected by a rigid rod AB. The rod slides along perpendicular rails as shown here. The velocity of A to the left is 10 m/s. What is the velocity of B when angle α = 30º ?

A
9.8 m/s

B
10 m/s

C
5.8 m/s

D
17.3 m/s

Solution
Question 4
4 / -1

A
–2Ka²

B
2Ka²

C
–Ka²

D
Ka²

Solution
Question 5
4 / -1

If at a height of 40 cm, the direction of motion of a projectile makes an angle π/4 with the horizontal, then its initial velocity and angle of projection are, respectively

A

B

C

D

Solution
Question 6
4 / -1

Three forces of magnitude 5N, 5N and √50 N act on a corner of a cube along the three sides as shown in Fig. Resultant of these forces is

A
10N along OB

B
15 N along OA

C
15 N along OC

D
10N along OE

Solution
Question 7
4 / -1

A

B

C

D

Solution
Question 8
4 / -1

A ball of mass 0.3 kg is whirled in a circle at the end of a string of a string 1.0 m long whose breaking strength is 10 N. The maximum speed of the ball is approximately (neglecting gravity)

A
2 ms^–1

B
7 ms^–1

C
10 ms^–1

D
15 ms^–1

Solution
Question 9
4 / -1

An object of mass 10 kg is whirled round a horizontal circle of radius 4 m by a revolving string inclined 300 to the vertical. If the uniform speed of the object is 5 ms^-1, the tension in the string (approximately) is

A
720 N

B
960 N

C
114 N

D
128 N

Solution
Question 10
4 / -1

A
x = 2y

B
y = 2x

C
x = y

D
y = 4x

Solution