SAT - Science - Physics - Motion

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Question - 1

A heavy object is lifted by a helicopter to a higher place. The helicopter is moving vertically upwards. The graph below shows the resultant force on the object as a function of time. The acceleration of the helicopter moving upwards.

  • A Increases
  • B decreases
  • C stays constant
  • D zero

Question - 2

A motorcycle accelerates uniformly from rest along a straight road, reaching a speed of 200 km/h after 10 s. At what stage during the motion does the bike's speedometer needle pass the 100 km/h mark?

  • A halfway along the road
  • B 5 seconds after starting
  • C some time before 5 sec
  • D some distance after the halfway mark

Question - 3

The v - t graph represents the motion of

  • A a projectile projected.vertically upward
  • B an electron in the H2 atom
  • C a bullet fired horizontally from the top of a tower
  • D a car with constant acceleration along a straight road.

Question - 4

The position-time graph for two objects A and B is shown in the figure. If VA and VB are the velocities of the objects A & B respectively. Then the correct option is

  • A VA = VB
  • B VA< VB
  • C VA> VB
  • D VA> VB upto certain time and after that VA < VB

Question - 5

A toy cyclist completes one round of a square track of side 2 m in 40 seconds. What will be the displacement at the end of 3 minutes?

  • A Zero
  • B 52 m
  • C \(2\sqrt { 2 } \) m
  • D 16 m

Question - 6

If a ball is thrown vertically upwards with speed u, the distance covered during the last t seconds of its, ascent is

  • A 1/2 gt2
  • B ut
  • C ut- 1/2 gt2
  • D (u + gt)t

Question - 7

A car covers 1/3 distance with speed 20 km/hr and 2/3 with 60 km/hr. Average speed is 

  • A 16m
  • B 10 m
  • C 8 m
  • D 12 m

Question - 8

When a ball is thrown up vertically with velocity V0 it reaches a maximum height of h. If one wishes to triple the maximum height then the ball should be thrown with velocity

  • A 3/2 V0
  • B \(\sqrt { 3 } \) V0
  • C 3  V0
  • D 9  V0

Question - 9

A ball is thrown from height h and another from 2 h. The ratio of time taken by the two balls to reach ground is

  • A \(\sqrt { 2 } :1\)
  • B \(1:\sqrt { 2 } \)
  • C 2:1
  • D 1:2

Question - 10

A ball is released freely from the top of a building of height h. How long will it take for the ball to come down if h=80 m, g= 10 m/s2

  • A 6 s
  • B 8 s
  • C 4 s
  • D 2 s
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