physical science 1601

A car moving at 15 m/s comes to a stop in 3 s. Its acceleration is

-5 m/s2.

The time needed for a car whose speed is 60 km/h to travel 800 m is

0.8 min.

A car starts from rest and reaches a speed of 15 m/s in 10s. Its acceleration is

1.5 m/s2.

An airplane reaches its takeoff speed of 60 m/s in 30 s starting from rest. The time it spends in going from 40 m/s to 60 m/s is

10 s.

In 6 min a person running at 10 km/h covers a distance of

1000 m.

A snail travels 45 cm in 20 min. Its average speed is

135 cm/h.

In the first 3 s after a car starts from rest with an acceleration of 4 m/s2 it will travel

18 m

After a stone dropped from a cliff has fallen 20 m, the stone's speed is approximately

20 m/s.

A ball thrown upward at 30 m/s will continue to rise for about

3.0 s.

When its brakes are applied, a car moving at 10 m/s undergoes an acceleration of -1.2 m/s2. In the next 5 s the car travels

35 m.

A car that starts from rest with a constant acceleration travels 50 m in the first 5 s. The car's acceleration is

4 m/s2.

A stone dropped from a cliff reaches the ground in 4 s. The stone's speed is then

40 m/s.

When its brakes are applied, a car moving at 10 m/s undergoes an acceleration of -1.2 m/s2. How far does the car travel before it comes to a stop?

42 m

A ball thrown upward at 30 m/s will reach the ground after about

6.0 s.

A car starts from rest with a constant acceleration of 5 m/s2. How much time does the car take to cover the first 160 m?

8 s